Intel Xeon “Diamond Rapids” to support PCIe Gen6 and CXL Gen3

Published: 13th Oct 2022, 08:01 GMT   Comments

Intel Diamond Rapids with PCIe Gen6

Hardware leaker YuuKi_Ans reveals first details on future Xeon architecture. 

YuuKi has been sharing confidential information on HPC series from Intel and AMD for a very long time. With access to non-public information and hardware, he has already revealed many details that would otherwise remain secret until launch. With some launches slipping away by months (if not years), this is probably as close as we get to some details of future architectures.

Recently, the same leaker revealed the first specifications of Intel Emerald Rapids, a successor to Sapphire Rapids and Granite Rapids, both product series seemingly pushed back due to never-ending delays of Intel HPC products. It looks like the newest update confirms that four generations from now, Intel will adopt PCI Express 6.0 technology.

Intel Granite and Diamond Rapids, Source: YuuKi_AnS

Intel has not confirmed when Diamond Rapids will be launching, in fact, the company never even confirmed the codename. However, the product was listed as ‘Future Gen’ featuring only big core (Performance).

The new details confirm that Diamond will support PCIe Gen6, which would be an upgrade over Granite Rapids with Gen5. Furthermore, 7th Gen Xeon Scalable architecture would also support CXL 3.0 (Compute Express Link), which is based on PCIe Gen6 implementation. The CXL 3.0 interface specifications were only released in August this year, but it will take another 3 years at least until we see it implemented in Intel Xeon products.

Unfortunately, there are no details on core count or CPU cache. The leaked slide may confirm, though, that Intel will continue using HBM memory in their HPC processors in the foreseeable future.

Intel Xeon Series Roadmap
VideoCardzSapphire RapidsEmeralds RapidsGranite RapidsDiamond Rapids
Series4th Gen Xeon5th Gen Xeon6th Gen Xeon7th Gen Xeon
SocketSocket ESocket ETBCTBC
Release Year2022202320242025+
PlatformEagle StreamEagle StreamBirch StreamTBC
Core µArchGolden CoveRedwood CoveNext Performance-CoreNext Performance-Core
Fabrication NodeIntel 7Intel 7Intel 3TBC
Max Cores56~64TBCTBC
Max TDP350W~370WTBCTBC
Max L3 Cache112MB120MBTBCTBC
Memory Support8x DDR5-48008x DDR5-56008x DDR58x DDR5
HBM Supportup to 64GB HBM2eYesYesYes
PCI ExpressPCIe 5/4, 80 lanesPCIe 5.0, 80 lanesPCIe 5.0PCIe 6.0
CXL SupportGen1Gen1Gen2Gen3

Source: YuuKi_Ans




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