Having introduced the Radeon VII video card based on the 7nm Vega architecture GPU at the end of winter, AMD did not endow it with PCI Express 4.0 support, although related accelerators Radeon Instinct on the same GPU had already implemented support for the new interface. In the case of the July updates that AMD management already listed this morning, PCI Express 4.0 support has been received by everything from 7nm Ryzen and EPYC processors to Radeon RX 5700 graphics cards and the AMD X570 chipset. By the way, in a slightly delayed publication On its website, the company specified that all five processors of the Matisse family, which will be presented on July 24, will support 4.0 PCI Express XNUMX lanes, regardless of the price category.
Of this number, 20 lines can be used to connect video cards, drives or other devices, and four PCI Express 4.0 lines are used to communicate with the AMD X570 logic set. The latter, in turn, supports 16 PCI Express 4.0 lanes. Accordingly, the entire platform in aggregate provides support for 40 PCI Express 4.0 lanes, which is indicated in the table from AMD's press release.
The company does not hesitate to explain in which cases the transition to PCI Express 4.0 is justified today. In the first place in terms of relevance are SSDs with PCI Express 4.0 interface, which will soon be offered by Galaxy (GALAX), Gigabyte (AORUS) and Phison. The latter provided AMD for testing a prototype Phison PS5016-E16 drive with a capacity of two terabytes with the NVMe protocol and a PCI Express 4.0 interface.
According to a footnote to the press release, a 42% increase in performance compared to a drive with a PCI Express 3.0 interface, such a drive shows in the test application Crystal DiskMark 6.0.2.
The advantages of PCI Express 2019 when working with graphics were also demonstrated on the stage of Computex 4.0. A bench based on a Ryzen 7 3800X processor and one of the Radeon RX 5700 family graphics cards was compared with a configuration based on an Intel Core i9-9900K and an NVIDIA GeForce RTX 2080 Ti graphics card. In a special test application 3DMark, which evaluates the speed of data exchange with a video card via the PCI Express interface, the AMD configuration with support for version 4.0 of this interface turned out to be 69% faster than its rival.
Source: 3dnews.ru