AMD patch confirms Zen 4 Epyc will support 12-channel DDR5 RAM


Briefly: A brand new Linux driver for AMD’s Epyc server CPUs has added assist for the corporate’s upcoming Zen 4 era of processors. The patch notes point out DDR5 RAM together with another particulars relating to reminiscence.

The newest Linux Error Detection And Correction driver for Epyc processors provides assist for AMD’s 19h, 10h-1Fh, and A0h-AFh fashions, in addition to Registered DDR5 (RDDR) and Load-Lowered DDR5 (LRDDR) reminiscence. AMD’s present Epyc CPUs solely assist DDR4 RAM, and we already know Zen 4 will work with DDR5.

RDDR and LRDDR are forms of reminiscence used for servers. In comparison with typical DDR, the previous affords them greater bandwidth and scalability, whereas the latter helps higher-density reminiscence.

Whereas the present Epycs are restricted to eight reminiscence controllers per socket, the patch confirms Zen 4 can have 12. It’s unclear how a lot of this data might apply to Zen 4 desktop CPUs.

Over the summer time, AMD confirmed Zen 4 was on monitor to launch subsequent yr. Made on TSMC’s 5nm node, the processors are anticipated to assist AM5 sockets and PCIe 5.0. In November, AMD revealed the “Genoa” and “Bergamo” information heart Zen 4 CPUs, which ought to launch in 2022 and 2023, respectively. Genoa will include 96 cores whereas Bergamo, designed for cloud information facilities, can have 128.

The desktop Zen 4s are anticipated to max out at 16 cores.

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