Iyo JEDEC Association haisati yaburitsa zviri pamutemo chirevo chechizvarwa chinotevera cheDDR5 RAM (yakasimba yekuwana ndangariro, DRAM). Asi kushaikwa kwegwaro repamutemo hakutadzise vagadziri veDRAM nevagadziri veakasiyana masisitimu pane chip (system-on-chip, SoC) kugadzirira kutanga kwayo. Svondo rapfuura, Cadence, mugadziri wehardware uye software yekugadzira machipisi, akagovera ruzivo rwayo maererano nekupinda kweDDR5 mumusika uye nekumwe kusimudzira.
DDR5 mapuratifomu: anopfuura gumi nemaviri mukusimudzira
Kuzivikanwa kwechero rudzi rwendangariro kunotemerwa nekuzivikanwa kwemapuratifomu anoitsigira, uye DDR5 haina mutsauko. Panyaya yeDDR5, tinoziva zvechokwadi kuti ichatsigirwa ne AMD EPYC processors yechizvarwa cheGenoa, pamwe neIntel Xeon Scalable processors yechizvarwa cheSapphire Rapids pavanenge vaburitswa mukupera kwa2021 kana kutanga kwa2022. Cadence, iyo inotopa iyo DDR5 controller uye DDR5 yemuviri interface (PHY) kune chip vanogadzira marezenisi, inoti ine anopfuura gumi nemaviri maSoC mukusimudzira kutsigira chizvarwa chinotevera chiyeuchidzo. Mamwe eaya masystem-on-chip achaonekwa kare, mamwe gare gare, asi panguva ino zviri pachena kuti kufarira tekinoroji nyowani yakakura kwazvo.
Cadence ine chivimbo chekuti kambani yeDDR5 controller uye DDR5 PHY inowirirana zvizere neinouya JEDEC yakatarwa shanduro 1.0, saka maSoCs anoshandisa Cadence matekinoroji anozoenderana neDDR5 memory modules inozoonekwa gare gare.
βKunyatsopinda mumapoka ekushanda eJEDEC chinhu chakanaka. Isu tinowana pfungwa yekuti chiyero chinoshanduka sei. Isu tiri mutongi uye PHY mutengesi uye tinogona kutarisira chero shanduko inogona kuitika munzira yekuzopedzisira yamira. Mumazuva ekutanga ekumisikidzwa, takakwanisa kutora zvinhu zvakajairika pasi pekuvandudzwa uye kushanda nevatinoshanda navo kuti tiwane mutongi anoshanda uye PHY prototype. Sezvo isu tave kuenda kushambadziro yechiyero, tine humbowo huri kuwedzera hunoratidza kuti yedu yehungwaru pfuma (IP) package ichatsigira zvakajairwa-inoenderana neDDR5 zvishandiso, "akadaro Marc Greenberg, director wekushambadzira kweDRAM IP kuCadence.
Antre: 16-Gbit DDR5-4800 machipisi
Shanduko kuenda kuDDR5 inounza dambudziko rakakura kune vanogadzira ndangariro, sezvo rudzi rutsva rweDRAM runofanira kupa panguva imwe chete yakawedzera chip kugona, yakakwirira data data rates, kuwedzera kunoshanda kunoshanda (pawachi frequency uye pachiteshi) uye panguva imwe chete kuderedza kushandiswa kwesimba. Pamusoro pezvo, DDR5 inotarisirwa kuita kuti zvive nyore kusanganisa akawanda maDRAM midziyo mupakeji imwe chete, ichibvumira yakakwira zvakanyanya ndangariro module pane izvo zvinoshandiswa neindasitiri nhasi.
Micron uye SK Hynix vakatozivisa kutanga kwekuendeswa kweiyo prototype memory modules yakavakirwa pa16-Gbit DDR5 machipi kune vavanodyidzana navo. Samsung, mugadziri mukuru weDRAM wepasirese, haisati yasimbisa zviri pamutemo kutanga kwekutakura prototypes, asi kubva pakuzivisa kwayo kumusangano weISSCC 2019, tinoziva kuti kambani iri kushanda ne16-Gbit chips uye DDR5-mhando module (zvisinei, izvi zvinoita. hazvireve kuti 8-Gbit machipisi Pachave pasina DDR5). Chero zvazvingava, zvinoita sekunge DDR5 ndangariro ichave iripo kubva kune ese matatu makuru ekugadzira DRAM kana mapuratifomu avo atanga kuoneka pamusika.
Cadence ine chivimbo chekuti yekutanga DDR5 machipi ichange iine huwandu hwegumi nematanhatu Gbit uye mwero wekufambisa data we16 Mega Transfers pasekondi (MT/s). Izvi zvakasimbiswa zvisina kunanga nekuratidzira kweSK Hynix DDR4800-5 module paCES 4800, pamwe chete nekuziviswa kwekutanga kwesampling (maitiro ekutumira zvigadzirwa prototypes kune vanobatana). Kubva kuDDR2020-5, chizvarwa chitsva chendangariro chinokura munzira mbiri: kugona uye kuita.
General vectors yeDDR5 budiriro, maererano nezvakatarisirwa naCadence:
- Kugona kwechipi chimwe chete kuchatanga pa16 Gbit, yobva yawedzera kusvika ku24 Gbit (tarisira mamodule e24 GB kana 48 GB), uyezve kusvika ku32 Gbit.
Panyaya yekuita, Cadence inotarisira kuti DDR5 yekumhanyisa data iwedzere kubva pa4800 MT/s kusvika pa5200 MT/s mumwedzi gumi nembiri mushure mekutangwa kweDDR12-18, uyezve kusvika pa4 MT/s mune imwe mwedzi gumi nemaviri, saka DDR4800 kuvandudzwa kwekuita pamasevha kuchaitika panguva yakaringana.
Kune maPC evatengi, zvakawanda zvinoenderana nevanodzora ndangariro mune microprocessors uye memory module vatengesi, asi anofarira maDIMM achave nekuita kurinani pane ayo anoshandiswa mumaseva.
Mumusika weseva, ine 16Gb machipisi, yemukati DDR5 optimizations, nyowani server architectures, uye kushandiswa kweRDIMMs pachinzvimbo cheLRDIMMs, single socket system ine 5GB DDR256 modules ichaona mashandiro akakosha ekuwedzera mune zvese kugona kwekubuda, uye maererano nekuwana data latencies. (zvichienzaniswa nemazuva ano LRDIMMs).
Cadence inotaura kuti DDR5's tekinoroji kuvandudzwa kuchaibvumira kuti iwedzere chaiyo memory bandwidth ne36% zvichienzaniswa neDDR4, kunyangwe pa3200 MT/s mareti ekufambisa data. Nekudaro, kana DDR5 ikashanda pakumhanya kwedhizaini ingangoita 4800 MT/s, iyo chaiyo yekubuda ichave 87% yakakwirira kupfuura DDR4-3200 chero zvakadaro. Nekudaro, chimwe cheakakosha maficha eDDR5 ichave zvakare kugona kuwedzera density ye monolithic memory chip kupfuura 16 Gbit.
DDR5 kare gore rino?
Sezvataurwa pamusoro apa, AMD Genoa neIntel Sapphire Rapids haifanirwe kuoneka kusvika pakupera kwa2021, uye zvakanyanya kutanga kwa2022. Zvisinei, Mr. Greenberg kubva kuCadence vane chivimbo mumamiriro ezvinhu ane tariro yekuvandudzwa kwezviitiko.
Vagadziri vendangariro vanoshuvira kutanga kuwanda kwemhando nyowani dzeDRAM mapuratifomu asati awanikwa. Zvichakadaro, kutumira gore risati rasvika AMD Genoa neIntel Sapphire Rapids yarova pamusika inoita kunge isati yakwana. Asi kutaridzika kweDDR5 miyedzo yakasiyana ine tsananguro dzakati wandei: AMD neIntel processors dzinotsigira DDR5 dziri padyo kupfuura zvatinoudzwa nemakambani eprosesa, kana kune mamwe maSoC ane DDR5 rutsigiro ari kupinda mumusika.
Chero zvazvingava, kana iyo DDR5 yakatarwa iri padanho rekupedzisira rekunyora, vagadziri vakakura veDRAM vanogona kutanga kugadzirwa kwakawanda kunyangwe pasina chiyero chakaburitswa. Mune dzidziso, vagadziri veSoC vanogonawo kutanga kutumira zvigadziriso zvavo mukugadzira panguva ino. Zvichakadaro, zvakaoma kufungidzira kuti DDR5 ichabata chero yakakosha musika mugove muna 2020 - 2021. pasina rutsigiro kubva kune makuru processor vatengesi.
Source: 3dnews.ru