Wednesday, May 22nd 2024
AMD Zen 6 to Cram Up to 32 CPU Cores Per CCD
AMD's future "Zen 6" CPU microarchitecture is rumored to cram up to 32 cores per CCD (CPU complex die), or the common client/server chiplet with the CPU cores, according to Kepler_L2, a reliable source with hardware leaks. At this point it's not clear if they are referring to the regular "Zen 6" CPU core, or the physically compacted "Zen 6c" core meant for high core-count cloud server processors. The current pure "Zen 4c" CCD found in EPYC "Bergamo" processor packs 16 cores across two 8-core CCX (CPU core complexes) that share a 16 MB L3 cache among the 8 cores within the CCX. The upcoming "Zen 5c" CCD will pack 16 cores, but in a single 16-core CCX that shares 32 MB of L3 cache among the 16 cores for improved per-core cache access. "Zen 6" is expected to double this to 32 cores per CCD.
The 32-core CCD powered by "Zen 6" (likely Zen 6c), might take advantage of process improvements to double the core-count. At this point, it's not clear if this jumbo CCD features a single large CCX with all 32 cores sharing a large L3 cache; or if it's using two 16-core CCX that shares, say, 32 MB of L3 cache among the 16 cores. What's clear with this leak, though, is that AMD is looking to continue ramping up CPU core counts per socket. Data-centers and cloud customers seem to love this, and AMD is the only x86 processor maker in a serious competition with Arm-based server processor manufacturers such as Ampere, to increase significantly increase core counts per socket with each generation.
Sources:
InstLatX64 (Twitter), Kepler_L2 (Twitter), harukaze5719 (Twitter)
The 32-core CCD powered by "Zen 6" (likely Zen 6c), might take advantage of process improvements to double the core-count. At this point, it's not clear if this jumbo CCD features a single large CCX with all 32 cores sharing a large L3 cache; or if it's using two 16-core CCX that shares, say, 32 MB of L3 cache among the 16 cores. What's clear with this leak, though, is that AMD is looking to continue ramping up CPU core counts per socket. Data-centers and cloud customers seem to love this, and AMD is the only x86 processor maker in a serious competition with Arm-based server processor manufacturers such as Ampere, to increase significantly increase core counts per socket with each generation.
44 Comments on AMD Zen 6 to Cram Up to 32 CPU Cores Per CCD
fake coresknife to a gun fight :laugh:But the question is. Is it 32 zen 6 performance core or zen 6C core the equivalent to intels efficient cores.
But 32 performance cores on am5. Yes please. Might be a worthy upgrade from my 5950X.
C-cores is something else.
www.phoronix.com/review/amd-zen4-zen4c-scaling
Zen 5 is going to have 16 CCDs on a single processor? In the same SP3 socket as current chips? That is going to be TIGHT in terms of spacing on the substrate!!!!
Zen 6 is also going to have SMT/Hyperthreading? Interesting! Add to the fact I thought both Intel and AMD were moving away from it with the security concerns/implications around using it.
Also the 32 cores are going to be one homogenous CCX? That sounds good from a latency aspect and the ability to pool L3 cache.
Hope that the Ryzen 9 CPU-s with 24 or 32 cores have extra memory channels as well.
Buy a Threadripper if you need more memory channels.
Looking forward to both ZENs anyways.Threadripper isn't for everybody.
This is about Zen6c, Zen4c is already 16cores per CCD, Zen6c will double it.He's saying 64 cores aren't for everybody just like threadripper.
but we're talking about soc's that come with a gpu and very likely an npu that will all be competing for memory bandwidth.
plenty of space on the AM5 pcb and as far as i know amd never promised they were going to keep am5 around all that long, they said they were going to keep it around for 3 years
those 3 years will be up at the end of 2025
Perhaps AMD will raise the bar to 32 cores in Ryzen 9.