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AMD Reportedly Planning Zen 4 EPYC Genoa CPUs With HBM Memory To Tackle Intel Sapphire Rapids Xeons
By
Hassan Mujtaba
Jul 17, 2021 12:38 EDT
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Intel may not be the only chip maker to offer HBM powered server CPUs as AMD is reportedly planning its own EPYC Genoa variants based on the Zen 4 architecture for bandwidth-bound workloads.
AMD To Answer Intel's Sapphire Rapids Xeon CPUs With Its Own HBM Powered Zen 4 EPYC Genoa CPUs, Alleges Rumor
The rumor comes from
Inpact-Hardware
who have reportedly received information from their sources that AMD is planning an HBM variant of its upcoming
EPYC Genoa CPUs
powered by the Zen 4 core architecture. While we have learned much about the standard Genoa CPUs, this is the first time we are hearing of an HBM variant.
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According to the report, an EPYC CPU with HBM memory is a recurring question among AMD's partners. Intel has already announced its HBM variant of Sapphire Rapids though those chips
aren't expected around 2023 (in volume)
. AMD is reportedly preparing its
Milan-X
lineup as an intermediate between Zen 3 and Zen 4 which would house 3D chip stacking technology though nothing is clear whether the die stacking is based around CCD's or
V-Cache (similar to next-gen Ryzen Zen 3 Desktop CPUs)
.
It is likely that AMD could offer Milan-X with 3D V-Cache as a showcase of how the low-level cache can help boost performance in bandwidth-bound workloads and ultimately scale it up with more premium HBM options when EPYC Genoa launches. The difference between Milan and Milan-X in terms of launch is around 2-3 quarters and the same timeframe can be expected for an AMD EPYC Genoa lineup with HBM.
What's definitely going to be interesting is AMD's HBM implementation as they can go with either traditional off-die methods or a more next-gen 3D Chip stacking tech. Intel hasn't confirmed what solution it will use for its HBM integration but they are most likely going to utilize their EMIB and Forveros interconnect/packaging technologies to integrated HBM memory on Xeon CPUs. It will be great to see both companies offer HBM server variants to expand their workload portfolio in the HPC segment.
AMD EPYC CPU Families:
Family Name
AMD EPYC Naples
AMD EPYC Rome
AMD EPYC Milan
AMD EPYC Genoa
Family Branding
EPYC 7001
EPYC 7002
EPYC 7003
EPYC 7004?
Family Launch
2017
2019
2021
2022
CPU Architecture
Zen 1
Zen 2
Zen 3
Zen 4
Process Node
14nm GloFo
7nm TSMC
7nm TSMC
5nm TSMC
Platform Name
SP3
SP3
SP3
SP5
Socket
LGA 4094
LGA 4094
LGA 4094
LGA 6096
Max Core Count
32
64
64
96
Max Thread Count
64
128
128
192
Max L3 Cache
64 MB
256 MB
256 MB
384 MB?
Chiplet Design
4 CCD's (2 CCX's per CCD)
8 CCD's (2 CCX's per CCD) + 1 IOD
8 CCD's (1 CCX per CCD) + 1 IOD
12 CCD's (1 CCX per CCD) + 1 IOD
Memory Support
DDR4-2666
DDR4-3200
DDR4-3200
DDR5-5200
Memory Channels
8 Channel
8 Channel
8 Channel
12 Channel
PCIe Gen Support
64 Gen 3
128 Gen 4
128 Gen 4
128 Gen 5
TDP Range
200W
280W
280W
320W (cTDP 400W)
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