{"id":36718,"date":"2019-10-31T22:13:20","date_gmt":"2019-10-31T19:13:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novaya-statya-agressivnyj-razgon-i-andervolting-radeon-rx-5700-i-radeon-rx-5700-xt-kak-eto-sdelat-i-nuzhno-li\/"},"modified":"2019-10-31T22:13:20","modified_gmt":"2019-10-31T19:13:20","slug":"novaya-statya-agressivnyj-razgon-i-andervolting-radeon-rx-5700-i-radeon-rx-5700-xt-kak-eto-sdelat-i-nuzhno-li","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/novaya-statya-agressivnyj-razgon-i-andervolting-radeon-rx-5700-i-radeon-rx-5700-xt-kak-eto-sdelat-i-nuzhno-li","title":{"rendered":"Nov\u00fd \u010dl\u00e1nok: Agres\u00edvny overclocking a undervolting Radeon RX 5700 a Radeon RX 5700 XT: ako to spravi\u0165 a je to potrebn\u00e9","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V\u0161etko mi je dovolen\u00e9, ale nie v\u0161etko je u\u017eito\u010dn\u00e9<\/p>\n

Nov\u00fd z\u00e1kon, Kor. 10:23<\/p>\n

Grafick\u00e9 karty NVIDIA v posledn\u00fdch rokoch neuspokojuj\u00fa be\u017en\u00fdch hr\u00e1\u010dov mo\u017enos\u0165ou pretaktovania. U\u017e na dosk\u00e1ch 10. gener\u00e1cie s\u00fa algoritmy automatick\u00e9ho riadenia taktovac\u00edch frekvenci\u00ed GPU nastaven\u00e9 tak, aby vy\u010derpali v\u00e4\u010d\u0161inu rezervy v\u00fdkonu v r\u00e1mci vypo\u010d\u00edtan\u00e9ho TDP a mo\u017enost\u00ed chladenia. Akceler\u00e1tory rodiny Turing, na druhej strane, kone\u010dne sklamali overclockerov, preto\u017ee aj \"extr\u00e9mne\" zariadenia ur\u010den\u00e9 na pretaktovanie pod kvapaln\u00fdm dus\u00edkom, ako s\u00fa MSI GeForce RTX 2080 Ti LIGHTNING Z<\/a><\/noindex> s\u00fa fakticky zbaven\u00e9 funkcie softv\u00e9rovej voltmodifik\u00e1cie. Poslednou rezerv\u00e1ciou, kde pretaktovanie st\u00e1le pre\u017e\u00edva, zost\u00e1vaj\u00fa grafick\u00e9 karty AMD. S \"Radeonmi\" na \u010dipoch Polaris a Vega si m\u00f4\u017eete naplno zahra\u0165, a to dokonca s opa\u010dn\u00fdm \u00famyslom \u2013 na zn\u00ed\u017eenie spotrebovanej energie pomocou undervoltingu.<\/p>\n

Nov\u00e9 Radeon RX 5700 a RX 5700 XT<\/a><\/noindex> s\u00fa tie\u017e pripraven\u00e9 na experimenty. Vysok\u00e1 energetick\u00e1 efekt\u00edvnos\u0165, ktor\u00fa zabezpe\u010dila architekt\u00fara RDNA a v\u00fdrobn\u00fd proces 7 nm, sama osebe otv\u00e1ra l\u00e1kav\u00e9 perspekt\u00edvy, a aj obvod referen\u010dn\u00fdch grafick\u00fdch kariet nie je tak\u00fd zl\u00fd, ako by sa na prv\u00fd poh\u013ead mohlo zda\u0165. Maj\u00fa siln\u00fd VRM s ve\u013ekou rezervou pr\u00fadu, a dokonca aj zv\u00fd\u0161en\u00e9 nap\u00e4tie nap\u00e1jania grafick\u00e9ho procesora mo\u017eno pova\u017eova\u0165 za pozit\u00edvne: existuje priestor aj na pretaktovanie, aj na undervolting. Len chladi\u010d je nedostato\u010dn\u00fd, ale s t\u00fdm sa zatia\u013e \u2013 do pr\u00edchodu prv\u00fdch partnersk\u00fdch grafick\u00fdch kariet v polovici augusta \u2013 mus\u00edme zmieri\u0165. V ka\u017edom pr\u00edpade slab\u00fd chladic\u00ed syst\u00e9m nebr\u00e1ni zisti\u0165 vopred, na \u010do s\u00fa \u010dipy Navi schopn\u00e9, vzh\u013eadom na posledn\u00e9 dosiahnut\u00e9 \u00faspechy overclockingovej mysle, preto\u017ee pre v\u00e1s, mil\u00ed \u010ditatelia, sme pripraven\u00ed zn\u00e1\u0161a\u0165 hluk turb\u00edny pri zv\u00fd\u0161en\u00fdch ot\u00e1\u010dkach.<\/p>\n

\"Nov\u00fd<\/p>\n

Softv\u00e9rov\u00e9 tabu\u013eky PowerPlay s\u013eubuj\u00fa Radeon RX 5700 XT pracovn\u00e9 frekvencie a\u017e do 2,3 GHz. Testy s vodn\u00fdm chladen\u00edm, ktor\u00e9 vykonali na\u0161i zahrani\u010dn\u00ed kolegovia, u\u017e potvrdili, \u017ee ak nie 2,3, tak 2,2 GHz \u2013 to je celkom dosiahnute\u013en\u00fd v\u00fdsledok. Prevod z\u00e1kladnej verzie Radeon RX 5700 sa dokonca jav\u00ed ako bezv\u00fdhradne ziskov\u00e1 invest\u00edcia, ke\u010f\u017ee karta pracuje na p\u00f4vodne zn\u00ed\u017een\u00fdch frekvenci\u00e1ch GPU. Ale ned\u00e1vajme si il\u00fazie, \u017ee tieto riadky boli nap\u00edsan\u00e9 pred t\u00fdm, ako sme uskuto\u010dnili vlastn\u00e9 testy. V podmienkach teoreticky neobmedzen\u00e9ho overclockingu \u010dipov Navi sa uk\u00e1zalo by\u0165 menej praktick\u00e9ho zmyslu, ne\u017e sme predpokladali \u2013 aspo\u0148 to plat\u00ed pre najv\u00fdkonnej\u0161\u00ed model. A probl\u00e9m nie je len a nie tak v kvalite chladenia a spotrebovanej energii, nad ktor\u00fdmi pri maxim\u00e1lnom pretaktovan\u00ed prem\u00fd\u0161\u013eaj\u00fa ako posledn\u00fd.<\/p>\n

Ale inak experimenty s nov\u00fdmi \u201eRadeonmi\u201c poskytli mno\u017estvo podnetov na zamyslenie \u2013 a o perspekt\u00edvach nov\u00fdch GPU na 7 nm technologickom procese, a o probl\u00e9moch, ktor\u00e9 brzdy v\u00fdkon s\u00fa\u010dasn\u00fdch spotrebite\u013esk\u00fdch grafick\u00fdch kariet oboch v\u00fdrobcov. Nakoniec vznikla in\u00e1 \u00faloha: ako ve\u013emi mo\u017eno zn\u00ed\u017ei\u0165 spotrebovan\u00fa energiu Radeon RX 5700 a RX 5700 XT prostredn\u00edctvom undervoltingu s minim\u00e1lnymi stratami v\u00fdkonu (a t\u00fdm aj so zn\u00ed\u017een\u00edm tepla spolu s hlu\u010dnos\u0165ou)? Ukazuje sa, \u017ee omnoho viac, ne\u017e sa spo\u010diatku zdalo.<\/p>\n

\u2b07<\/a><\/noindex>#<\/a><\/noindex>Termointerface referen\u010dn\u00fdch grafick\u00fdch kariet: grafitov\u00e1 podlo\u017eka namiesto tepelnej pasty<\/strong><\/h2>\n

Predt\u00fdm, ako za\u010dneme s overclockingom, undervoltingom a n\u00e1sledn\u00fdmi meraniami v\u00fdkonu Radeon RX 5700 a RX 5700 XT, po\u010fme uzavrie\u0165 jednu ved\u013eaj\u0161iu ot\u00e1zku. Je zn\u00e1me, \u017ee za\u010d\u00ednaj\u00fac Radeon VII<\/a><\/noindex> ako termointerface medzi GPU a chladi\u010dom referen\u010dn\u00fdch grafick\u00fdch kariet AMD sa pou\u017e\u00edva grafitov\u00e1 podlo\u017eka, nie obvykl\u00e1 tepeln\u00e1 pasta. Aby sme mohli urobi\u0165 fotografie dosiek ti\u0161t\u011bn\u00fdch v p\u00f4vodnom preh\u013eade akceler\u00e1torov, demontovali sme chladenie a tepeln\u00e1 podlo\u017eka to nepre\u017eila, roztrhla sa na kusy. Tak pre\u010do neskontrolova\u0165, ako sa zmenili pracovn\u00e9 parametre chladi\u010da po v\u00fdmene tepeln\u00fdch interface s overenou pastou ARCTIC MX-2.<\/p>\n

\"Nov\u00fd<\/p>\n

Grafitov\u00e1 podlo\u017eka, vybran\u00e1 AMD pre Radeon VII a Navi, sa naz\u00fdva Hitachi TC-HM03 a m\u00e1 mimoriadne vysok\u00fa tepeln\u00fa vodivos\u0165 v porovnan\u00ed s termofasetami \u2013 40\u201390 W\/(m\u00b7K). Pre porovnanie: tepeln\u00e1 vodivos\u0165 ARCTIC MX-2 dosahuje iba 5,6 W\/(m\u00b7K), zatia\u013e \u010do kvalitn\u00e1 pasta Thermal Grizzly Kryonaut m\u00e1 12,5 W\/(m\u00b7K). Medzi v\u0161etk\u00fdmi vari\u00e1ciami termointerfacia, ktor\u00e9 sa pou\u017e\u00edvaj\u00fa na odvod tepla z mikro\u010dipov, len kvapaln\u00fd kov m\u00e1 lep\u0161ie vlastnosti \u2013 ako napr\u00edklad 73 W\/(m\u00b7K) pri zliatine Thermal Grizzly Conductonaut. Existuje v\u0161ak nieko\u013eko d\u00f4vodov, pre\u010do tak\u00e9 materi\u00e1ly ako Hitachi TC-HM03 doteraz nevytla\u010dili termofasety zo v\u0161etk\u00fdch chladiacich syst\u00e9mov. Po prv\u00e9, s\u00fa jednoducho drah\u00e9, a po druh\u00e9, v\u00fdsledn\u00e1 tepeln\u00e1 vodivos\u0165 interfacu je nepriamo \u00famern\u00e1 jeho hr\u00fabke, ktor\u00e1 je u podlo\u017eky zjavne v\u00e4\u010d\u0161ia ako u termofasety \u2013 za predpokladu adekv\u00e1tneho a rovnomern\u00e9ho stla\u010denia chladi\u010da. Hovor\u00ed sa v\u0161ak, \u017ee pr\u00e1ve nedostatky referen\u010dn\u00fdch chladi\u010dov v poslednom bode viedli AMD k tomu, aby najprv opustila termofasetu v Radeon VII a potom aj v akceler\u00e1toroch s \u010dipmi Navi.<\/p>\n

\"Nov\u00fd<\/p>\n

Ka\u017edop\u00e1dne, grafitov\u00e1 podlo\u017eka u\u017e nie je v na\u0161ich grafick\u00fdch kart\u00e1ch a toto s\u00fa n\u00e1sledky. Termofaseta v\u00f4bec nezvysila \u00farove\u0148 hluku a stabiln\u00e9 frekvencie pod z\u00e1\u0165a\u017eou (posunuli sa iba o 12\u201337 MHz v teste Crysis 3), ale teploty GPU sa predsa len zn\u00ed\u017eili \u2013 u star\u0161ieho modelu o 3 \u00b0C, zatia\u013e \u010do \u010dip \u201eoby\u010dajn\u00e9ho\u201c Radeon RX 5700 sa ochladil o cel\u00fdch 13! Vyzer\u00e1 to, \u017ee v testovacom vzorke p\u00f4vodne nebolo v\u0161etko v poriadku so zostavou chladiaceho syst\u00e9mu. V ka\u017edom pr\u00edpade sme sa teraz presved\u010dili, \u017ee Hitachi TC-HM03 namiesto be\u017enej termofasety \u2013 to nie je probl\u00e9m, ale z\u00e1rove\u0148 to nie je z\u00e1zra\u010dn\u00fd prostriedok, bez ktor\u00e9ho sa referen\u010dn\u00e9 \u201eRadeon\u201c nem\u00f4\u017eu zaob\u00eds\u0165. Ani sme nemuseli zvy\u0161ova\u0165 tlaky pomocou podlo\u017eiek na skrutk\u00e1ch chladi\u010da, aby sme kompenzovali rozdiel v hr\u00fabke medzi vrstvou termofasety a grafitovou podlo\u017ekou. A u\u017e v\u00f4bec nem\u00e1 v\u00fdznam ju odstra\u0148ova\u0165 v n\u00e1deji na lep\u0161ie pretaktovanie grafick\u00e9ho procesora \u2013 otvorene slab\u00fd chladi\u010d na referen\u010dn\u00fdch dosk\u00e1ch to ur\u010dite neoprav\u00ed.<\/p>\n

\u2b07<\/a><\/noindex>#<\/a><\/noindex>Preto\u010denie Radeon RX 5700 a RX 5700 XT s programov\u00fdmi tabu\u013ekami PowerPlay<\/strong><\/h2>\n

Pred popisom met\u00f3dy, ktor\u00e1 odblokuje taktovacie frekvencie, nap\u00e4tie nap\u00e1jania a rezervu v\u00fdkonu grafick\u00fdch kariet na \u010dipoch Navi, si pripome\u0148me be\u017en\u00e9 varovanie. Ak\u00e9ko\u013evek prekon\u00e1vanie limitov, najm\u00e4 nad r\u00e1mec nomin\u00e1lnych charakterist\u00edk, vykon\u00e1vate na vlastn\u00e9 riziko a nesiete zodpovednos\u0165 za jeho n\u00e1sledky. Bezpe\u010dnos\u0165 \u010dipov Navi a \u010fal\u0161\u00edch komponentov grafickej karty v tak\u00fdchto podmienkach nikto nezaru\u010duje.<\/strong><\/p>\n

Ak ste pripraven\u00ed prija\u0165 \u010derven\u00fa tabletku pre overclocking, pokojne si stiahnite a pou\u017eite s\u00fabory zverejnen\u00e9 nemeck\u00fdm zdrojom igor’sLAB, \u2013 pre z\u00e1kladn\u00fa verziu Radeon RX 5700<\/a><\/noindex> a pre XT<\/a><\/noindex>. Obsahuj\u00fa k\u013e\u00fa\u010de registrov Windows so softv\u00e9rov\u00fdmi tabu\u013ekami PowerPlay, ktor\u00e9 ur\u010duj\u00fa po\u010diato\u010dn\u00e9 hodnoty nasleduj\u00facich premenn\u00fdch a rozsah, v ktorom je povolen\u00e9 ich regulova\u0165. Tento recept funguje tak, \u017ee pri in\u0161tal\u00e1cii ovl\u00e1da\u010da grafickej karty AMD sa do registra zap\u00ed\u0161e k\u00f3pia tabu\u013eky PowerPlay z jej BIOSu, ale pri ka\u017edom \u010fal\u0161om re\u0161tarte ovl\u00e1da\u010d kontroluje pr\u00e1ve register. Takto sa taktovalo karty s \u010dipmi Polaris a Vega. A Navi \u2013 napriek tomu, \u017ee AMD s\u013eubovalo uzavrie\u0165 medzeru \u2013 sa nestal v\u00fdnimkou.<\/p>\n

\"Nov\u00fd<\/p>\n

Na hackovanie PowerPlay je potrebn\u00e9 importova\u0165 do registrov jeden z reg-s\u00faborov pripraven\u00fdch igor’sLAB a re\u0161tartova\u0165 po\u010d\u00edta\u010d, ale je \u017eiaduce najprv vy\u010disti\u0165 register od v\u0161etk\u00fdch z\u00e1znamov s\u00favisiacich s grafick\u00fdmi adapt\u00e9rmi, ktor\u00e9 kedy v syst\u00e9me boli, pomocou programu Display Driver Uninstaller s n\u00e1slednou \u010distou in\u0161tal\u00e1ciou ovl\u00e1da\u010da. V opa\u010dnom pr\u00edpade je potrebn\u00e9 zabezpe\u010di\u0165, aby reg-s\u00fabor odkazoval na spr\u00e1vny k\u013e\u00fa\u010d pod\u013ea premennej DriverDesc, a v pr\u00edpade potreby upravi\u0165 adresu. Po importe do registrov sa n\u00e1hradn\u00e1 tabu\u013eka PowerPlay objav\u00ed v 16-bitovej premennej PP_PhmSoftPowerPlayTable, a na to, aby ste obnovili nastavenia, ktor\u00e9 ur\u010duje firmware karty, sta\u010d\u00ed ju odstr\u00e1ni\u0165 z registrov \u2013 bu\u010f ru\u010dne, alebo pomocou reg-s\u00faboru<\/a><\/noindex>.<\/p>\n

\n\"Nov\u00fd<\/p>\n

Najagres\u00edvnej\u0161ie tabu\u013eky pre \u010dipy Navi umo\u017e\u0148uj\u00fa zv\u00fd\u0161i\u0165 taktovaciu frekvenciu grafick\u00e9ho procesora Radeon RX 5700 XT na 2300 MHz, nap\u00e4tie nap\u00e1jania na 1,25 V a rezerva v\u00fdkonu na 90 %. Upozorn\u00edme, \u017ee cel\u00e1 sch\u00e9ma, ktor\u00e1 registruje spotrebovan\u00fa energiu na grafick\u00fdch kart\u00e1ch  AMD, je z\u00e1visl\u00e1 na regul\u00e1tore nap\u00e4tia GPU a nezoh\u013ead\u0148uje energetick\u00fa spotrebu ostatn\u00fdch komponentov zariadenia, ani \u00fa\u010dinnos\u0165 konverzie (na rozdiel od kariet NVIDIA, ktor\u00e9 meraj\u00fa pr\u00fad na \u0161untoch v l\u00edni\u00e1ch 12 V). V\u00fdsledkom je, \u017ee pos\u00fava\u010d dostupnej energie v programe WattMan sa t\u00fdka iba grafick\u00e9ho procesora: pri \u0161tandardnom limite 180 W softv\u00e9rov\u00e9 tabu\u013eky PowerPlay umo\u017e\u0148uj\u00fa roz\u0161\u00edri\u0165 ho na 342.<\/p>\n

Z\u00e1kladn\u00e1 verzia Radeon RX 5700 bude obmedzen\u00e1 na 2100 MHz pri taktovacej frekvencii jadra, nap\u00e4t\u00ed nap\u00e1jania 2,225 V a v\u00fdkone grafick\u00e9ho procesora 285 W (+ 90 %). V oboch pr\u00edpadoch je povolen\u00e9 pretaktovanie \u010dipov GDDR6 na 1 GHz, \u010do zodpoved\u00e1 prenosovej kapacite 16 Gbit\/s na kontakt zbernice. Je \u0161koda, \u017ee zatia\u013e neexistuje mo\u017enos\u0165 nahra\u0165 Radeon RX 5700 firmv\u00e9rom z vy\u0161\u0161ieho modelu, aby sa dostali do rovnak\u00fdch po\u010diato\u010dn\u00fdch podmienok.<\/p>\n

\"Nov\u00fd<\/p>\n

Limity v\u00fdkonu, ktor\u00e9 s\u00fa dostupn\u00e9 pre Radeon RX 5700 a Radeon RX 5700 XT v\u010faka programov\u00fdm tabu\u013ek\u00e1m PowerPlay, vyzeraj\u00fa obrovsky. Samotn\u00e1 AMD umo\u017e\u0148uje zv\u00fd\u0161i\u0165 spotrebu GPU oboch modelov len na 180 a 270 W. Ale ako je divn\u00e9, referen\u010dn\u00e9 grafick\u00e9 karty s\u00fa na tak\u00e9 vysok\u00e9 energetick\u00e9 n\u00e1roky \u00faplne pripraven\u00e9 \u2014 aspo\u0148 pokia\u013e ide o regul\u00e1tor nap\u00e4tia. VRM referen\u010dn\u00fdch dosiek obsahuje 6\u20137 nap\u00e1jac\u00edch f\u00e1z (power stages) ON Semiconductor FDMF3170 s menovit\u00fdm pr\u00fadom 70 A na ka\u017ed\u00fa. Tak\u00e9to mocn\u00e9 a kvalitn\u00e9 komponenty sa doteraz nach\u00e1dzali iba v GeForce RTX 2080 Ti a Radeon VII. Na porovnanie: ur\u00fdch\u013eova\u010de Founders Edition na \u010dipoch TU106 (GeForce RTX 2060, RTX 2060 SUPER a RTX 2070) sa uspokojuj\u00fa so \u0161iestimi nap\u00e1jac\u00edmi f\u00e1zami po 55 A.<\/p>\n

\"Nov\u00fd<\/p>\n

Na\u0161a v\u00fdstraha v\u0161ak st\u00e1le zost\u00e1va v platnosti. MOSFET-y regul\u00e1tora nap\u00e4tia \u2014 nie s\u00fa jedin\u00fdmi zariadeniami na doske, ktor\u00e9 bud\u00fa vystaven\u00e9 zv\u00fd\u0161enej z\u00e1\u0165a\u017ei. Osobitne to plat\u00ed pre samotn\u00fd grafick\u00fd procesor Navi 10, ktor\u00e9mu na pre\u0165a\u017eenie nad 2 GHz vy\u017eaduje dos\u0165 vysok\u00e9 nap\u00e4tie pod\u013ea \u0161tandardov \u010dipov s fotolitografiou 7 nm.<\/p>\n

Aby sme na jadre Radeon RX 5700 XT dosiahli frekvenciu 2160 MHz, museli sme vyu\u017ei\u0165 cel\u00fd potenci\u00e1l nap\u00e4tia, ktor\u00e9 v existuj\u00facich tabu\u013ek\u00e1ch PowerPlay dosahuje 1,25 V. A Radeon RX 590, a dokonca aj Radeon RX Vega 64 s vodn\u00fdm chladen\u00edm (a re\u010d je o \u010dipoch vydan\u00fdch pod\u013ea normy 12 a 14 nm) sa uspokojuj\u00fa s men\u0161ou. Sme si u\u017e ist\u00ed z\u00e1kladnou verziou Radeon RX 570: pre\u0165a\u017eenie GPU dosiahlo limit na 2100 MHz, ale na udr\u017eanie stability sta\u010d\u00ed podstatne ni\u017e\u0161ie nap\u00e4tie ako u XT pri \u0161tandardnej frekvencii 2010 MHz, \u2014 1,093 V. Pod\u013ea svojich pracovn\u00fdch parametrov je Radeon RX 5700, spracovan\u00fd pomocou programov\u00fdch tabuliek PowerPlay, fakticky XT so s\u00fa\u010dasn\u00fdm pre\u0165a\u017een\u00edm, vy\u0161\u0161\u00edm rezervou v\u00fdkonu a undervoltingom.<\/p>\n\n\n\n
\n\"Nov\u00fd<\/p>\n<\/td>\n <\/td>\n\n\"Nov\u00fd<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Av\u0161ak pretaktovanie opera\u010dnej pam\u00e4te GDDR6 na maximum 1000 MHz na oboch dosk\u00e1ch sa uk\u00e1zalo ako nemo\u017en\u00e9. V pr\u00edpade star\u0161ieho modelu, vybaven\u00e9ho \u010dipmi Samsung K4Z80325BC-H14, bolo potrebn\u00e9 obetova\u0165 tie \u00faspechy, ktor\u00e9 sme dosiahli v hlavnom preh\u013eade noviniek, a spokojne sa uspokoji\u0165 s v\u00fdslednou priepustnos\u0165ou 14,4 Gb\/s. Radeon RX 5700 naopak umo\u017enil lep\u0161ie pretaktovanie pam\u00e4te (\u010dipy Micron 9GA77 D9WCW) ako predt\u00fdm \u2014 a\u017e na 14,8 Gb\/s. Vyzer\u00e1 to, \u017ee s in\u0161tal\u00e1ciou chladenia tejto karty naozaj boli nejak\u00e9 probl\u00e9my.<\/p>\n

K\u013e\u00fa\u010dov\u00fdm faktorom pre z\u00e1sadn\u00e9 experimenty s \u010dipmi Navi je posilnen\u00e9 chladenie. V bud\u00facnosti tento probl\u00e9m vyrie\u0161ia partneri AMD, no zatia\u013e m\u00e1me k dispoz\u00edcii len referen\u010dn\u00e9 grafick\u00e9 karty, tak\u017ee budeme musie\u0165 jednoducho spusti\u0165 turb\u00ednu na maxim\u00e1lnych ot\u00e1\u010dkach \u2014 to je jedin\u00fd sp\u00f4sob, ako udr\u017ea\u0165 teplotu v najteplej\u0161ej \u010dasti jadra (Junction Temperature), na ktor\u00fa sa automatika grafickej karty orientuje, v medziach 110 \u00b0C, po ktor\u00fdch nast\u00e1va havarijn\u00e9 zn\u00ed\u017eenie taktovac\u00edch frekvenci\u00ed.<\/p>\n

A aj opera\u010dnej pam\u00e4te pod referen\u010dn\u00fdm chladi\u010dom by neu\u0161kodilo viac vzduchu. Na rozdiel od v\u00e4\u010d\u0161iny akceler\u00e1torov NVIDIA, Radeon RX 5700 (XT) odovzd\u00e1va cez API nameran\u00e9 hodnoty teplotn\u00fdch senzorov GDDR6, ktor\u00e9 je mo\u017en\u00e9 sledova\u0165 v GPU-Z a pretaktovac\u00edch utilit\u00e1ch. Aj pri \u0161tandardn\u00fdch nastaveniach sa pam\u00e4\u0165 ohrieva na 78\u201382 \u00b0C, \u010do je u\u017e dostato\u010dne vysok\u00e1 teplota \u2014 aspo\u0148 pre \u010dipy Micron, ktor\u00e9 s\u00fa navrhnut\u00e9 na prev\u00e1dzku pri podmienkach a\u017e do 95 \u00b0C (\u0161pecifik\u00e1cie Samsung sme v otvorenom pr\u00edstupe nena\u0161li). O regul\u00e1tor nap\u00e4tia sa niet potrebn\u00e9 ob\u00e1va\u0165. Nap\u00e1jacie stupne FDMF3170 maj\u00fa tak\u00fd v\u00fdborn\u00fd \u00fa\u010dinnos\u0165, \u017ee teplota pri za\u0165a\u017een\u00ed nepresahuje 68 \u00b0C na doske XT a 63 \u00b0C v \"be\u017enom\" Radeon RX 5700 \u2014 aj ke\u010f v celkovom chladen\u00ed GPU naozaj hreje vlastn\u00fd VRM, nie naopak.<\/p>\n\n\n\n
\n

\"Nov\u00fd<\/p>\n<\/td>\n

 <\/td>\n\n

\"Nov\u00fd<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u2b07<\/a><\/noindex>#<\/a><\/noindex>Undervoltovanie<\/strong><\/h2>\n

V p\u00f4vodnej recenzii Radeon RX 5700 a Radeon RX 5700 XT sme u\u017e poznamenali, \u017ee na oboch dosk\u00e1ch grafick\u00e9 procesory pracuj\u00fa s nadmern\u00fdm nap\u00e4t\u00edm. Zd\u00e1 sa, \u017ee AMD op\u00e4\u0165 rozhodlo prehnane na\u0161tartova\u0165 \u010dipy pred uveden\u00edm do predaja a poistilo sa vy\u0161\u0161\u00edm nap\u00e4t\u00edm proti nevyhnutnej variabilite kvality krem\u00edka. A predsa e\u0161te v \u010dase Radeon RX 480 spolo\u010dnos\u0165 s\u013eubovala zn\u00ed\u017ei\u0165 nadbyto\u010dn\u00e9 nap\u00e4tie, aby zbyto\u010dne nezahrievala vzduch. Dokonca m\u00e1me diapozit\u00edvy z roku 2016 s t\u00fdmito vyhl\u00e1seniami.<\/p>\n

\"Nov\u00fd<\/p>\n

Na\u0161\u0165astie, to, \u010do in\u017einieri AMD neurobili, si m\u00f4\u017eu kupuj\u00faci grafick\u00fdch kariet spravi\u0165 sami. V na\u0161ich prv\u00fdch pokusoch o undervolting Radeon RX 5700 a Radeon RX 5700 XT sme sa sna\u017eili nestrati\u0165 ani jeden FPS v hr\u00e1ch a u\u017e vtedy sme dosiahli v\u00fdznamn\u00e9 zn\u00ed\u017eenie spotreby energie. Ale hluk referen\u010dn\u00e9ho chladenia n\u00e1s n\u00fati kona\u0165 akt\u00edvnej\u0161ie. Aby sme na\u0161li zlat\u00fa stredn\u00fa cestu medzi v\u00fdkonom a spotrebou, mus\u00edme posun\u00fa\u0165 maxim\u00e1lne frekvencie GPU nadol spolu s nap\u00e4t\u00edm. U Radeon RX 5700 XT sme zn\u00ed\u017eili hornej hranice jadra z 2010 na 1860 a nap\u00e4tie z 1,193 na 0,991 V. Samozrejme, ur\u010dit\u00e9 straty v\u00fdkonu s\u00fa v takom pr\u00edpade nevyhnutn\u00e9, ale rozhodne nie tak\u00e9, ako by sa mohlo predpoklada\u0165 na z\u00e1klade maxim\u00e1lnych frekvenci\u00ed, - v tom sa e\u0161te predt\u00fdm utvrd\u00edme.<\/p>\n

Parametre z\u00e1kladnej verzie Radeon RX 5700 s\u00fa u\u017e bl\u00edzko komfortnej z\u00f3ny \u010dipu Navi, no \u010fal\u0161ia optimaliz\u00e1cia je st\u00e1le mo\u017en\u00e1. Na zn\u00ed\u017eenie nap\u00e4tia GPU z 0,979 na 0,839 V sta\u010d\u00ed zastavi\u0165 pri maxim\u00e1lnej frekvencii 1700 MHz namiesto p\u00f4vodn\u00fdch 1750.<\/p>\n\n\n\n
\n

\"Nov\u00fd<\/p>\n<\/td>\n

 <\/td>\n\n

\"Nov\u00fd<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u2b07<\/a><\/noindex>#<\/a><\/noindex>Frekvencie pod za\u0165a\u017een\u00edm, spotreba energie, teplota, hladina hluku<\/strong><\/h2>\n

S\u00fadaz pod\u013ea predbe\u017en\u00fdch meran\u00ed v Crysis 3 a pracovn\u00fdch parametrov v modern\u00fdch hr\u00e1ch programov\u00e9 tabu\u013eky PowerPlay splnili svoj \u00fa\u010del. So strednou frekvenciou GPU 1864 MHz, ktor\u00fa Radeon RX 5700 XT udr\u017euje v 12 testovac\u00edch hr\u00e1ch, sa star\u0161\u00ed Navi vy\u0161plhal na 2100 MHz a okam\u017eit\u00e1 frekvencia dosahuje a\u017e 2141 MHz. Delta taktovac\u00edch frekvenci\u00ed sa pohybuje medzi 153 a 305 MHz v z\u00e1vislosti od konkr\u00e9tnej aplik\u00e1cie a v relat\u00edvnom vyjadren\u00ed predstavuje 8\u201317 %.<\/p>\n

Ale, ako sa dalo o\u010dak\u00e1va\u0165, cel\u00e1 energetick\u00e1 efekt\u00edvnos\u0165 Navi pri takomto overclocku sa rozpadla. \u010cip prakticky nepretr\u017eite pracuje pod otvorene desiv\u00fdm nap\u00e4t\u00edm 1,245 V (tak\u00e9to nap\u00e4tie bolo potrebn\u00e9 pred siedmymi rokmi na overclock grafick\u00fdch procesorov Tahiti, postaven\u00fdch pod\u013ea normy 28 nm), a spotrebovan\u00e1 energia v Crysis 3 dosiahla 325 namiesto 222 W v be\u017enom re\u017eime. Nie nadarmo sme spustili referen\u010dn\u00e9 turbosyst\u00e9my na maxim\u00e1lnych ot\u00e1\u010dkach: teplota GPU pod\u013ea okrajov\u00e9ho sn\u00edma\u010da dokonca klesla z 80 na 77 \u00b0C, a \u010dipy GDDR6 z 82 na 78 \u00b0C. Ale ukazovate\u013e hor\u00faceho bodu (Junction Temperature) st\u00e1le vzr\u00e1stol z 92 na 101 \u00b0C - rukou dotiahnu\u0165 k 110 \u00b0C, po ktorom nast\u00e1va automatick\u00e9 zn\u00ed\u017eenie v\u00fdkonu.<\/p>\n

Hlas ventil\u00e1torov chladenia, ktor\u00fd pracuje r\u00fdchlos\u0165ou pribli\u017ene 4500 ot.\/min, aj ke\u010f pote\u0161\u00ed u\u0161i prav\u00e9ho overclockera, je pre trval\u00fa prev\u00e1dzku \u00faplne neprijate\u013en\u00fd. Pre maxim\u00e1lne pretaktovan\u00fa Radeon RX 5700 XT jasne potrebuje v\u00fdkonnej\u0161\u00ed chladi\u010d \u2014 ide\u00e1lne nie\u010do trojslotov\u00e9 s viacer\u00fdmi ventil\u00e1tormi, a e\u0161te lep\u0161ie vodn\u00e9 chladenie. Na\u0161\u0165astie sa u\u017e na trhu objavili vodn\u00e9 bloky pre referen\u010dn\u00e9 dosky.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Pracovn\u00e9 parametre pod za\u0165a\u017een\u00edm (Crysis 3)<\/th>\n<\/tr>\n
Grafick\u00e1 karta<\/td>\nNastavenia<\/td>\nTaktovacia frekvencia GPU, MHz<\/td>\nNap\u00e4tie nap\u00e1jania GPU, V<\/td>\nOt\u00e1\u010dky ventil\u00e1torov, ot.\/min (% z max.)<\/td>\n<\/tr>\n
Priem.<\/td>\nMax.<\/td>\nLimit<\/td>\nPriem.<\/td>\nMax.<\/td>\nPriem.<\/td>\n<\/tr>\n
AMD Radeon RX 5700 XT (2010\/14000 MHz, 8 GB)<\/td>\nTepeln\u00e1 pasta ARCTIC MX-2<\/td>\n1816<\/td>\n1833<\/td>\n2010<\/td>\n1,083<\/td>\n1,193<\/td>\n2100 (43%)<\/td>\n<\/tr>\n
AMD Radeon RX 5700 XT (1860\/14000 MHz, 8 GB) UV<\/td>\nTepeln\u00e1 pasta ARCTIC MX-2, -201 mV vCore<\/td>\n1807<\/td>\n1812<\/td>\n1860<\/td>\n0,993<\/td>\n0,993<\/td>\n1836 (38%)<\/td>\n<\/tr>\n
AMD Radeon RX 5700 XT (2160\/14400 MHz, 8 GB)<\/td>\nTepeln\u00e1 pasta ARCTIC MX-2, +58 mV vCore<\/td>\n2100<\/td>\n2106<\/td>\n2160<\/td>\n1,245<\/td>\n1,250<\/td>\n4533 (100%)<\/td>\n<\/tr>\n
AMD Radeon RX 5700 (1750\/14000 MHz, 8 GB)<\/td>\nTepeln\u00e1 pasta ARCTIC MX-2<\/td>\n1652<\/td>\n1665<\/td>\n1750<\/td>\n0,952<\/td>\n0,981<\/td>\n1535 (32%)<\/td>\n<\/tr>\n
AMD Radeon RX 5700 (1700\/14000 MHz, 8 GB) UV<\/td>\nTepeln\u00e1 pasta ARCTIC MX-2, -140 mV vCore<\/td>\n1637<\/td>\n1641<\/td>\n1701<\/td>\n0,843<\/td>\n0,843<\/td>\n1263 (26%)<\/td>\n<\/tr>\n
AMD Radeon RX 5700 (2100\/14800 MHz, 8 GB)<\/td>\nTepeln\u00e1 pasta ARCTIC MX-2, +113 mV vCore<\/td>\n2033<\/td>\n2037<\/td>\n2100<\/td>\n1,093<\/td>\n1,093<\/td>\n4473 (100%)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pozn.:<\/strong> Meranie v\u0161etk\u00fdch parametrov sa vykon\u00e1va po zahriat\u00ed GPU a stabiliz\u00e1cii taktovac\u00edch frekvenci\u00ed.<\/p>\n

Z\u00e1kladn\u00fd model Radeon RX 5700 sa v\u010faka softv\u00e9rov\u00fdm tabulk\u00e1m PowerPlay pretaktoval e\u0161te lep\u0161ie, a celkovo vyzer\u00e1 \u017eivotaschopnej\u0161ie. Namiesto priemernej stabilnej frekvencie 1683 MHz v testovac\u00edch hr\u00e1ch sme dosiahli 2053, pri\u010dom rozdiel frekvenci\u00ed pri pretaktovan\u00ed a v \u0161tandardnom re\u017eime sa pohybuje v rozmedz\u00ed od 325 do 353 MHz (19\u201321 %). Pretaktovan\u00fd RX 5700 pracuje na frekvencii vy\u0161\u0161ej ako \u0161tandardn\u00e1 \u00farove\u0148 XT, no nap\u00e1jacie nap\u00e4tie je pritom prakticky rovnak\u00e9 \u2014 1,093 V. N\u00e1rast v\u00fdkonu z 187 na 250 W nie je najradostnej\u0161ia spr\u00e1va, ale ak porovn\u00e1me obe grafick\u00e9 karty pri pretaktovan\u00ed, star\u0161\u00ed model vyhr\u00e1va len 72 MHz priemern\u00fdch hern\u00fdch frekvenci\u00ed, pri\u010dom spotrebuje u\u017e o 75 W viac. Takto sa plat\u00ed za ka\u017ed\u00fd megahertz, ke\u010f \u010dip pracuje bl\u00edzko svojho frekven\u010dn\u00e9ho limitu. Pre Navi 10 z\u00f3na r\u00fdchlo klesaj\u00faceho zisku za\u010d\u00edna okolo 2 GHz a v\u0161etko nad 2,1 GHz m\u00e1 sk\u00f4r akademick\u00fd ne\u017e praktick\u00fd z\u00e1ujem.<\/p>\n

Treba poznamena\u0165, \u017ee aj grafick\u00e9 karty NVIDIA sa pri overclocking-u zasek\u00e1vaj\u00fa na \u00farovni tesne nad 2 GHz pri nap\u00e4t\u00ed nap\u00e1jania porovnate\u013enom s t\u00fdm, ktor\u00e9 m\u00e1 Radeon RX 5700, hoci \u010dipy Turing nemaj\u00fa tak\u00fa jemn\u00fa fotolitografiu ako 7-nanometrov\u00fd Navi. Ale rast hustoty tranzistorov, ktor\u00fd zabezpe\u010dil nov\u00fd v\u00fdrobn\u00fd proces TSMC, e\u0161te neznamen\u00e1, \u017ee nap\u00e1jacie nap\u00e4tie (najm\u00e4 za hranicami typick\u00fdch pracovn\u00fdch podmienok) mus\u00ed by\u0165 v\u017edy ni\u017e\u0161ie.<\/p>\n

\"Nov\u00fd<\/p>\n

Pozn.: <\/strong>V\u00fdkon grafick\u00fdch kariet sa registruje samostatne od CPU a ostatn\u00fdch komponentov PC pomocou amp\u00e9rmetra JUNTEK VAT-1050. Aby sa s\u00fa\u010dasne meral pr\u00fad prech\u00e1dzaj\u00faci konektormi dodato\u010dn\u00e9ho nap\u00e1jania a slotov materskej dosky, grafick\u00e1 karta sa prip\u00e1ja cez tvrden\u00fd riser PCI Express x16, v ktorom s\u00fa nap\u00e1jacie linky preru\u0161en\u00e9 a vyveden\u00e9 na samostatn\u00fd k\u00e1bel.<\/p>\n

Zv\u00fd\u0161en\u00e9 chladenie pri maxim\u00e1lnych ot\u00e1\u010dkach turb\u00edny nie je pre overclocking Radeon RX 5700 takou naliehavou potrebou ako v pr\u00edpade XT a bolo potrebn\u00e9 iba ako poistka, aby sme sa naisto vyhli throttlingu. V teste Crysis 3 maxim\u00e1lna teplota GPU na okrajovom sn\u00edma\u010di klesla z 81 na 66 \u00b0C, Junction Temperature zostala na \u00farovni 79\u201380 a \u010dipy GDDR6 sa neprehHeat\u00e1vaj\u00fa nad 72 \u00b0C. No aj ke\u010f nie je nutn\u00e9 zn\u00e1\u0161a\u0165 rev turb\u00edny ot\u00e1\u010daj\u00facej sa r\u00fdchlos\u0165ou 4,5 tis\u00edca ot\u00e1\u010dok za min\u00fatu pre trval\u00fa prev\u00e1dzku taktovan\u00e9ho Radeon RX 5700 pod referen\u010dn\u00fdm chladi\u010dom, nejak\u00e9 manipul\u00e1cie s krivkou ventil\u00e1tora bud\u00fa predsa len potrebn\u00e9 (napokon, spotrebov\u00e1va o 14 % viac energie ne\u017e XT v \u0161tandardnom re\u017eime). Z \u010d\u00edrej zvedavosti sme spustili Crysis 3 na Radeon RX 5700 s overclockingom a zv\u00fd\u0161enou rezervou v\u00fdkonu bez ak\u00fdchko\u013evek zmien v automatike chladenia, av\u0161ak ni\u010d dobr\u00e9 z toho nevy\u0161iel: GPU sa r\u00fdchlo zahrelo na 90 \u00b0C na okrajovom sn\u00edma\u010di a na 107 v hor\u00facom mieste. \u010cipy RAM prekro\u010dili vypo\u010d\u00edtan\u00e9 parametre s teplotou 98 \u00b0C a opern\u00fd syst\u00e9m zamrzol bez mo\u017enosti obnovi\u0165 procesy ovl\u00e1da\u010da grafickej karty \u2013 ako to zvy\u010dajne b\u00fdva pri poruche opera\u010dnej pam\u00e4te GPU.<\/p>\n

\"Nov\u00fd<\/p>\n

Prostredn\u00edctvom undervoltingu pre\u0161li obe grafick\u00e9 karty s prijate\u013en\u00fdmi stratami v taktoch. Maxim\u00e1lnu frekvenciu jadra v Radeon RX 5700 XT sme zn\u00ed\u017eili o 200 MHz, ale len v troch z dvan\u00e1stich testovac\u00edch hier priemern\u00e9 frekvencie utrpeli viac ne\u017e o 100 MHz. Rozdiel sa pohybuje v rozmedz\u00ed \u2013142 a +11 MHz (niekedy undervolting sp\u00f4sobuje automatick\u00e9 zvy\u0161ovanie v r\u00e1doch \u0161tandardn\u00e9ho TDP), a priemern\u00e1 delta predstavuje 64 MHz (3 % z be\u017enej \u00farovne). Iba priemern\u00e1 maxim\u00e1lna frekvencia sa posunula nadol hne\u010f o 107 MHz. Na druhej strane sme dok\u00e1zali zn\u00ed\u017ei\u0165 spotrebovan\u00fa energiu grafickej karty pri zn\u00ed\u017eenom nap\u00e4t\u00ed a frekvenci\u00e1ch z 219 na 191 W. Je to \u0161koda, \u017ee to malo na teplotu GPU len mal\u00fd vplyv \u2013 rozdiel iba 3 \u00b0C, a ventil\u00e1tor st\u00e1le funguje pomerne hlasno: na \u00farovni z\u00e1kladn\u00e9ho modelu RX 5700 v \u0161tandardnom re\u017eime.<\/p>\n

Podtaktovanie Radeon RX 5700 je \u0165a\u017e\u0161ie postrehn\u00fa\u0165 pod z\u00e1\u0165a\u017eou, ako u XT. Priemern\u00e1 frekvencia GPU vo hr\u00e1ch klesla o 35\u201361 MHz (3 %), maximum kleslo o 43 MHz. Ale hlavn\u00e9, spotreba RX 5700 pod z\u00e1\u0165a\u017eou v Crysis 3 u\u017e nie je 187, ale 157 W: dokonca aj GeForce RTX 2060 SUPER spotrebuje viac. Na chladenie u\u017e nie s\u00fa \u017eiadne v\u00fdhrady: teplota GPU zostala nezmenen\u00e1 a hladina hluku je ni\u017e\u0161ia ako u ni\u017e\u0161\u00edch grafick\u00fdch kariet Founders Edition.<\/p>\n

\"Nov\u00fd<\/p>\n

\u2b07<\/a><\/noindex>#<\/a><\/noindex>V\u00fdkon po pretaktovan\u00ed a undervoltingu<\/strong><\/h2>\n

Na pos\u00fadenie hern\u00e9ho v\u00fdkonu sme sa obmedzili na testy pri rozl\u00ed\u0161en\u00ed 1440p: v tomto re\u017eime Radeon RX 5700 a RX 5700 XT u\u017e evidentne nenar\u00e1\u017eaj\u00fa na v\u00fdkon centr\u00e1lneho procesora, zatia\u013e \u010do pri 4K pri maxim\u00e1lnych nastaveniach kvality grafiky grafick\u00e9 karty takejto \u00farovne ob\u010das dosahuj\u00fa tak n\u00edzky sn\u00edmkov\u00fd pomer, \u017ee nie je mo\u017en\u00e9 porovna\u0165 v\u00fdsledky s potrebnou presnos\u0165ou. A ako ste si u\u017e mo\u017eno mohli domyslie\u0165 z n\u00e1znakov rozpt\u00fdlen\u00fdch v teoretickej \u010dasti recenzie, overclocking \u010dipov Navi nepriniesol v\u00fdsledky, ktor\u00e9 by sa dali o\u010dak\u00e1va\u0165 na z\u00e1klade \u010dist\u00fdch taktn\u00fdch frekvenci\u00ed.<\/p>\n

Radeon RX 5700 XT, aj ke\u010f z\u00edskal priemern\u00e9 zv\u00fd\u0161enie frekvencie GPU o 13 % (a v\u00fdkonu o 106 W), pridal len 5 % dodato\u010dn\u00fdch FPS. A ak analyzujeme parametre v jednotliv\u00fdch hr\u00e1ch, v priemere iba 44 % teoretick\u00e9ho v\u00fdkonu, ktor\u00fd dosiahol overclocking, sa prejavil v testovac\u00edch v\u00fdsledkoch. \u010co je hor\u0161ie, minim\u00e1lny framerate, meran\u00fd na 1. percentile distrib\u00facie \u010dasu sn\u00edmky, sa v niektor\u00fdch hr\u00e1ch dokonca zn\u00ed\u017eil. S overclockingom Navi sa zjavne nie\u010do pokazilo, ale v \u010dom, v \u010dom, v taktoch sme si ist\u00ed \u2014 pri spotrebe energie je to vidie\u0165. Hlavn\u00fd d\u00f4vod, ktor\u00fd m\u00f4\u017ee vysvetli\u0165 sklamuj\u00face v\u00fdsledky, je nedostatok \u0161\u00edrky p\u00e1sma pam\u00e4te (SBP), preto\u017ee u ni\u017e\u0161ieho modelu je v\u00fdkon tesnej\u0161ie prepojen\u00fd s frekvenciami.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/th>\nAMD Radeon RX 5700 XT (2010\/14000 MHz, 8 GB)<\/th>\nAMD Radeon RX 5700 XT (2160\/14400 MHz, 8 GB)<\/th>\nZmena priemernej taktn\u00e9 frekvencie GPU, MHz<\/th>\nZmena priemernej sn\u00edmkovej frekvencie<\/th>\n<\/tr>\n
Priem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\nPriem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\n<\/tr>\n
Ashes of the Singularity: Escalation<\/td>\n1 801<\/td>\n1 913<\/td>\n2 104<\/td>\n2 125<\/td>\n+302 (17%)<\/td>\n+2%<\/td>\n<\/tr>\n
Assassin\u2019s Creed Odyssey<\/td>\n1 955<\/td>\n1 970<\/td>\n2 108<\/td>\n2 117<\/td>\n+153 (8%)<\/td>\n+2%<\/td>\n<\/tr>\n
Battlefield V<\/td>\n1 893<\/td>\n1 919<\/td>\n2 078<\/td>\n2 118<\/td>\n+184 (10%)<\/td>\n+6%<\/td>\n<\/tr>\n
DiRT Rally 2.0<\/td>\n1 848<\/td>\n1 883<\/td>\n2 105<\/td>\n2 131<\/td>\n+257 (14%)<\/td>\n+11%<\/td>\n<\/tr>\n
Far Cry 5<\/td>\n1 790<\/td>\n1 915<\/td>\n2 094<\/td>\n2 115<\/td>\n+305 (17%)<\/td>\n+7%<\/td>\n<\/tr>\n
Final Fantasy XV<\/td>\n1 889<\/td>\n2 014<\/td>\n2 109<\/td>\n2 141<\/td>\n+220 (12%)<\/td>\n+8%<\/td>\n<\/tr>\n
GTA V<\/td>\n1 926<\/td>\n1 954<\/td>\n2 094<\/td>\n2 111<\/td>\n+168 (9%)<\/td>\n+6%<\/td>\n<\/tr>\n
Metro Exodus.<\/td>\n1 824<\/td>\n1 906<\/td>\n2 094<\/td>\n2 114<\/td>\n+270 (15%)<\/td>\n+5%<\/td>\n<\/tr>\n
Shadow of the Tomb Raider<\/td>\n1 892<\/td>\n1 960<\/td>\n2 106<\/td>\n2 133<\/td>\n+215 (11%)<\/td>\n+2%<\/td>\n<\/tr>\n
Strange Brigade<\/td>\n1 865<\/td>\n1 911<\/td>\n2 101<\/td>\n2 114<\/td>\n+236 (13%)<\/td>\n+8%<\/td>\n<\/tr>\n
Tom Clancy\u2019s The Division 2<\/td>\n1 815<\/td>\n1 852<\/td>\n2 099<\/td>\n2 128<\/td>\n+284 (16%)<\/td>\n+3%<\/td>\n<\/tr>\n
Total War: WARHAMMER II<\/td>\n1 868<\/td>\n1 922<\/td>\n2 107<\/td>\n2 135<\/td>\n+239 (13%)<\/td>\n+3%<\/td>\n<\/tr>\n
Max.<\/td>\n1 955<\/td>\n2 014<\/td>\n2 109<\/td>\n2 141<\/td>\n+305 (17%)<\/td>\n+11%<\/td>\n<\/tr>\n
Priem.<\/td>\n1 864<\/td>\n1 927<\/td>\n2 100<\/td>\n2 124<\/td>\n+236 (13%)<\/td>\n+5%<\/td>\n<\/tr>\n
Min.<\/td>\n1 790<\/td>\n1 852<\/td>\n2 078<\/td>\n2 111<\/td>\n+153 (8%)<\/td>\n+2%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Radeon RX 5700 dosiahol pri overclockingu 13-percentn\u00e9 zv\u00fd\u0161enie framerate pri priemernom n\u00e1raste frekvenci\u00ed o 21 % \u2014 u\u017e 63 % dodato\u010dnej v\u00fdpo\u010dtovej sily sa dostalo do benchmarkov. Je potrebn\u00e9 poznamena\u0165, \u017ee pam\u00e4\u0165 Micron na doske RX 5700 sa prevolila lep\u0161ie ako \u010dipy Samsung u Radeon RX 5700 XT (14,8 oproti 14,4 Gb\/s), ale zl\u00e9 \u0161k\u00e1lovanie FPS pri overclockingu vlajkovej lode Navi sotva m\u00f4\u017eeme prip\u00edsa\u0165 rozdielu v 3 % SBP. Napr\u00edklad Radeon VII, v\u00fdkon rastie<\/a><\/noindex> prakticky v pomere 1:1 s taktovac\u00edmi frekvenciami GPU, ke\u010f\u017ee priepustnos\u0165 \u0161tyroch z\u00e1sobn\u00edkov HBM2 je mnohon\u00e1sobne vy\u0161\u0161ia v porovnan\u00ed s 256-bitovou zbernicou GDDR6, a daj\u00fa sa celkom dobre pretaktova\u0165.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/th>\nAMD Radeon RX 5700 (1750\/14000 MHz, 8 GB)<\/th>\nAMD Radeon RX 5700 (2100\/14800 MHz, 8 GB)<\/th>\nZmena priemernej taktn\u00e9 frekvencie GPU, MHz<\/th>\nZmena priemernej sn\u00edmkovej frekvencie<\/th>\n<\/tr>\n
Priem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\nPriem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\n<\/tr>\n
Ashes of the Singularity: Escalation<\/td>\n1 672<\/td>\n1 696<\/td>\n2 026<\/td>\n2 057<\/td>\n+353 (21%)<\/td>\n+14%<\/td>\n<\/tr>\n
Assassin\u2019s Creed Odyssey<\/td>\n1 695<\/td>\n1 703<\/td>\n2 039<\/td>\n2 049<\/td>\n+344 (20%)<\/td>\n+14%<\/td>\n<\/tr>\n
Battlefield V<\/td>\n1 673<\/td>\n1 684<\/td>\n1 998<\/td>\n2 021<\/td>\n+325 (19%)<\/td>\n+10%<\/td>\n<\/tr>\n
DiRT Rally 2.0<\/td>\n1 687<\/td>\n1 695<\/td>\n2 033<\/td>\n2 039<\/td>\n+346 (21%)<\/td>\n+14%<\/td>\n<\/tr>\n
Far Cry 5<\/td>\n1 676<\/td>\n1 687<\/td>\n2 022<\/td>\n2 049<\/td>\n+346 (21%)<\/td>\n+9%<\/td>\n<\/tr>\n
Final Fantasy XV<\/td>\n1 692<\/td>\n1 719<\/td>\n2 040<\/td>\n2 075<\/td>\n+348 (21%)<\/td>\n+16%<\/td>\n<\/tr>\n
GTA V<\/td>\n1 683<\/td>\n1 695<\/td>\n2 026<\/td>\n2 038<\/td>\n+343 (20%)<\/td>\n+12%<\/td>\n<\/tr>\n
Metro Exodus.<\/td>\n1 669<\/td>\n1 693<\/td>\n2 018<\/td>\n2 041<\/td>\n+349 (21%)<\/td>\n+13%<\/td>\n<\/tr>\n
Shadow of the Tomb Raider<\/td>\n1 690<\/td>\n1 700<\/td>\n2 036<\/td>\n2 046<\/td>\n+346 (20%)<\/td>\n+14%<\/td>\n<\/tr>\n
Strange Brigade<\/td>\n1 684<\/td>\n1 694<\/td>\n2 031<\/td>\n2 057<\/td>\n+347 (21%)<\/td>\n+12%<\/td>\n<\/tr>\n
Tom Clancy\u2019s The Division 2<\/td>\n1 678<\/td>\n1 691<\/td>\n2 031<\/td>\n2 109<\/td>\n+353 (21%)<\/td>\n+13%<\/td>\n<\/tr>\n
Total War: WARHAMMER II<\/td>\n1 689<\/td>\n1 697<\/td>\n2 033<\/td>\n2 049<\/td>\n+344 (20%)<\/td>\n+15%<\/td>\n<\/tr>\n
Max.<\/td>\n1 695<\/td>\n1 719<\/td>\n2 040<\/td>\n2 109<\/td>\n+353 (21%)<\/td>\n+16%<\/td>\n<\/tr>\n
Priem.<\/td>\n1 683<\/td>\n1 696<\/td>\n2 028<\/td>\n2 053<\/td>\n+345 (21%)<\/td>\n+13%<\/td>\n<\/tr>\n
Min.<\/td>\n1 669<\/td>\n1 684<\/td>\n1 998<\/td>\n2 021<\/td>\n+325 (19%)<\/td>\n+9%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nepopierate\u013ene by sme sa v\u0161ak nemali posmieva\u0165 Radeon RX 5700 XT a v\u00fdvoj\u00e1rom AMD kv\u00f4li nedostatku PS. Ak porovn\u00e1me v\u00fdkonnos\u0165 akceler\u00e1torov NVIDIA zo s\u00e9rie GeForce RTX 20 s hern\u00fdmi FPS, \u013eahko si v\u0161imneme, \u017ee \u010d\u00edm v\u00e4\u010d\u0161ie je GPU, t\u00fdm viac gigaflopov ide nazmar. Obmedzen\u00e1 r\u00fdchlos\u0165 opera\u010dnej pam\u00e4te mohla zohr\u00e1va\u0165 v\u00fdznamn\u00fa \u00falohu, ke\u010f\u017ee v\u0161etky modely zalo\u017een\u00e9 na TU106 a TU104, s v\u00fdnimkou GeForce RTX 2060, maj\u00fa rovnak\u00fa konfigur\u00e1ciu RAM, pri\u010dom najv\u00e4\u010d\u0161\u00ed skok v pomere medzi teoretick\u00fdm v\u00fdkonom a v\u00fdsledkami v hr\u00e1ch sa deje pr\u00e1ve medzi RTX 2060 a RTX 2060 SUPER: z\u00e1kladn\u00fd model m\u00e1 192-bitov\u00fa pam\u00e4\u0165ov\u00fa zbernicu, zatia\u013e \u010do SUPER m\u00e1 256-bitov\u00fa. Nie je prekvapuj\u00face, \u017ee NVIDIA u\u017e implementovala \u010dipy GDDR6 s priepustnos\u0165ou 16 Gb\/s na dosk\u00e1ch GeForce RTX 2080 SUPER.<\/p>\n

Radeon RX 5700 XT ur\u010dite len odhalil probl\u00e9m, s ktor\u00fdm sa stretli obaja v\u00fdrobcovia grafick\u00fdch procesorov, preto\u017ee \u017eiadny \u010dip NVIDIA nem\u00f4\u017ee by\u0165 takto v\u00fdrazne pretaktovan\u00fd bez hardv\u00e9rov\u00fdch modifik\u00e1ci\u00ed (pokia\u013e neberieme do \u00favahy «elitek» dosky, pre ktor\u00e9 vyd\u00e1vaj\u00fa firmv\u00e9r a softv\u00e9r v\u00fdlu\u010dne na \u0161peci\u00e1lnu po\u017eiadavku). Napriek tomu, \u010das\u0165 viny za slzy overclockers pravdepodobne le\u017e\u00ed aj na softv\u00e9rskej skupine Radeon Technologies Group. Probl\u00e9my s rovnomern\u00fdm tempom renderovania sn\u00edmok s\u00fa pri Navi pr\u00edtomn\u00e9 aj pri \u0161tandardn\u00fdch taktoch. Okrem toho RDNA je \u00faplne nov\u00e1 grafick\u00e1 architekt\u00fara a doladi\u0165 ovl\u00e1da\u010d pred premi\u00e9rou 5000 s\u00e9rie AMD, ako je u tejto spolo\u010dnosti zvykom, sa nepodarilo.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/th>\nAMD Radeon RX 5700 XT (2010\/14000 MHz, 8 GB)<\/th>\nAMD Radeon RX 5700 XT (1860\/14000 MHz, 8 GB) UV<\/th>\nZmena priemernej taktn\u00e9 frekvencie GPU, MHz<\/th>\nZmena priemernej sn\u00edmkovej frekvencie<\/th>\n<\/tr>\n
Priem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\nPriem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\n<\/tr>\n
Ashes of the Singularity: Escalation<\/td>\n1 801<\/td>\n1 913<\/td>\n1 804<\/td>\n1 819<\/td>\n+3 (0%)<\/td>\n-2%<\/td>\n<\/tr>\n
Assassin\u2019s Creed Odyssey<\/td>\n1 955<\/td>\n1 970<\/td>\n1 813<\/td>\n1 826<\/td>\n-142 (7%)<\/td>\n-6%<\/td>\n<\/tr>\n
Battlefield V<\/td>\n1 893<\/td>\n1 919<\/td>\n1 782<\/td>\n1 794<\/td>\n-112 (6%)<\/td>\n-4%<\/td>\n<\/tr>\n
DiRT Rally 2.0<\/td>\n1 848<\/td>\n1 883<\/td>\n1 805<\/td>\n1 812<\/td>\n-43 (2%)<\/td>\n0%<\/td>\n<\/tr>\n
Far Cry 5<\/td>\n1 790<\/td>\n1 915<\/td>\n1 801<\/td>\n1 811<\/td>\n+11 (1%)<\/td>\n0%<\/td>\n<\/tr>\n
Final Fantasy XV<\/td>\n1 889<\/td>\n2 014<\/td>\n1 793<\/td>\n1 914<\/td>\n-96 (5%)<\/td>\n-2%<\/td>\n<\/tr>\n
GTA V<\/td>\n1 926<\/td>\n1 954<\/td>\n1 796<\/td>\n1 810<\/td>\n-130 (7%)<\/td>\n0%<\/td>\n<\/tr>\n
Metro Exodus.<\/td>\n1 824<\/td>\n1 906<\/td>\n1 786<\/td>\n1 805<\/td>\n-38 (2%)<\/td>\n0%<\/td>\n<\/tr>\n
Shadow of the Tomb Raider<\/td>\n1 892<\/td>\n1 960<\/td>\n1 805<\/td>\n1 812<\/td>\n-87 (5%)<\/td>\n-2%<\/td>\n<\/tr>\n
Strange Brigade<\/td>\n1 865<\/td>\n1 911<\/td>\n1 807<\/td>\n1 815<\/td>\n-58 (3%)<\/td>\n-2%<\/td>\n<\/tr>\n
Tom Clancy\u2019s The Division 2<\/td>\n1 815<\/td>\n1 852<\/td>\n1 799<\/td>\n1 805<\/td>\n-17 (1%)<\/td>\n+2%<\/td>\n<\/tr>\n
Total War: WARHAMMER II<\/td>\n1 868<\/td>\n1 922<\/td>\n1 805<\/td>\n1 812<\/td>\n-63 (3%)<\/td>\n0%<\/td>\n<\/tr>\n
Max.<\/td>\n1 955<\/td>\n2 014<\/td>\n1 813<\/td>\n1 914<\/td>\n+11 (1%)<\/td>\n+2%<\/td>\n<\/tr>\n
Priem.<\/td>\n1 864<\/td>\n1 927<\/td>\n1 799<\/td>\n1 820<\/td>\n-64 (3%)<\/td>\n-1%<\/td>\n<\/tr>\n
Min.<\/td>\n1 790<\/td>\n1 852<\/td>\n1 782<\/td>\n1 794<\/td>\n-142 (7%)<\/td>\n-6%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/th>\nAMD Radeon RX 5700 (1750\/14000 MHz, 8 GB)<\/th>\nAMD Radeon RX 5700 (1700\/14000 MHz, 8 GB) UV<\/th>\nZmena priemernej taktn\u00e9 frekvencie GPU, MHz<\/th>\nZmena priemernej sn\u00edmkovej frekvencie<\/th>\n<\/tr>\n
Priem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\nPriem. taktn\u00e1 frekvencia GPU, MHz<\/td>\nMax. taktn\u00e1 frekvencia GPU, MHz<\/td>\n<\/tr>\n
Ashes of the Singularity: Escalation<\/td>\n1 672<\/td>\n1 696<\/td>\n1 638<\/td>\n1 653<\/td>\n-35 (2%)<\/td>\n-5%<\/td>\n<\/tr>\n
Assassin\u2019s Creed Odyssey<\/td>\n1 695<\/td>\n1 703<\/td>\n1 650<\/td>\n1 658<\/td>\n-45 (3%)<\/td>\n+2%<\/td>\n<\/tr>\n
Battlefield V<\/td>\n1 673<\/td>\n1 684<\/td>\n1 629<\/td>\n1 638<\/td>\n-44 (3%)<\/td>\n-3%<\/td>\n<\/tr>\n
DiRT Rally 2.0<\/td>\n1 687<\/td>\n1 695<\/td>\n1 641<\/td>\n1 645<\/td>\n-46 (3%)<\/td>\n-3%<\/td>\n<\/tr>\n
Far Cry 5<\/td>\n1 676<\/td>\n1 687<\/td>\n1 627<\/td>\n1 641<\/td>\n-49 (3%)<\/td>\n-1%<\/td>\n<\/tr>\n
Final Fantasy XV<\/td>\n1 692<\/td>\n1 719<\/td>\n1 639<\/td>\n1 673<\/td>\n-53 (3%)<\/td>\n-2%<\/td>\n<\/tr>\n
GTA V<\/td>\n1 683<\/td>\n1 695<\/td>\n1 639<\/td>\n1 650<\/td>\n-44 (3%)<\/td>\n-2%<\/td>\n<\/tr>\n
Metro Exodus.<\/td>\n1 669<\/td>\n1 693<\/td>\n1 629<\/td>\n1 643<\/td>\n-40 (2%)<\/td>\n0%<\/td>\n<\/tr>\n
Shadow of the Tomb Raider<\/td>\n1 690<\/td>\n1 700<\/td>\n1 630<\/td>\n1 651<\/td>\n-61 (4%)<\/td>\n-2%<\/td>\n<\/tr>\n
Strange Brigade<\/td>\n1 684<\/td>\n1 694<\/td>\n1 642<\/td>\n1 653<\/td>\n-42 (2%)<\/td>\n-2%<\/td>\n<\/tr>\n
Tom Clancy\u2019s The Division 2<\/td>\n1 678<\/td>\n1 691<\/td>\n1 641<\/td>\n1 676<\/td>\n-37 (2%)<\/td>\n-2%<\/td>\n<\/tr>\n
Total War: WARHAMMER II<\/td>\n1 689<\/td>\n1 697<\/td>\n1 644<\/td>\n1 650<\/td>\n-46 (3%)<\/td>\n-4%<\/td>\n<\/tr>\n
Max.<\/td>\n1 695<\/td>\n1 719<\/td>\n1 650<\/td>\n1 676<\/td>\n-35 (2%)<\/td>\n+2%<\/td>\n<\/tr>\n
Priem.<\/td>\n1 683<\/td>\n1 696<\/td>\n1 637<\/td>\n1 653<\/td>\n-45 (3%)<\/td>\n-2%<\/td>\n<\/tr>\n
Min.<\/td>\n1 669<\/td>\n1 684<\/td>\n1 627<\/td>\n1 638<\/td>\n-61 (4%)<\/td>\n-5%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ale ak sa v\u00fdkon Navi v hr\u00e1ch tak zle \u0161k\u00e1luje s rast\u00facimi taktn\u00fdmi frekvenciami, je spravodliv\u00e9 poveda\u0165 aj opa\u010dne: je mo\u017en\u00e9 zn\u00ed\u017ei\u0165 frekvencie, ale zachova\u0165 r\u00fdchlos\u0165 na rovnakej \u00farovni. V\u00fdsledkom undervoltingu s obmedzen\u00fdmi maxim\u00e1lnymi frekvenciami obidve modifik\u00e1cie Radeon RX 5700 stratili v priemere 1\u20132 % FPS a v najhor\u0161om pr\u00edpade len 5 %. Tak\u00e9to skromn\u00e9 straty sa bohatou odmenou odplatia za \u00fasporu 28\u201330 W spotrebovanej energie a zn\u00ed\u017een\u00fa \u00farove\u0148 hluku.<\/p>\n\n\n\n
\n\"Nov\u00fd<\/p>\n<\/td>\n <\/td>\n\n\"Nov\u00fd<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Zdroj: 3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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