AMD Zen 6 to Cram Up to 32 CPU Cores Per CCD

[btarunr]

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.



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[phanbuey]

that's kind of awesome. Kind of a big jump if zen 5 is 8 cores tho.

 

[natr0n]

AMD is oozing with Zen.

 

[R0H1T]

AMD ~ don't bring fake cores knife to a gun fight

Spoiler

 

[Tomgang]

That could theoretical bring 32 cores and even 64 cores to am5 socket with zen 6.

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.

 

[qcmadness]

That could theoretical bring 32 cores and even 64 cores to am5 socket with zen 6.

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.

Zen 6c is not comparable to Intel e-cores.

 

[SL2]

Is it 32 zen 6 performance core or zen 6C core the equivalent to intels efficient cores.

If you want E-cores you should buy Intel lol.

C-cores is something else.

AMD Zen 4 vs. Zen 4C Performance, Zen 4C Core Scaling With Ryzen 5 8500G - Phoronix

www.phoronix.com

 

[ARF]

Zen 6 is a 2027 thing, or a 2026 thing? Let's first see next-gen Zen 5...

 

[SL2]

Zen 6 is a 2027 thing, or a 2026 thing? Let's first see next-gen Zen 5...

2027 is 3 years after Zen 5, so that would be quite unlikely. I can't imagine AMD planning for that.

That could theoretical bring 32 cores and even 64 cores to am5 socket with zen 6.

Dual channel RAM and 64 cores sounds like a bad idea. Also, there's no mention of AM5, only SP3/SP5/SP7.

 

[kondamin]

2 channel memory is going to feed 32 or even 64 cores And some graphics

 

[Panther_Seraphin]

So this seems to be purely the max configs of EPYC processors.

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.

 

[SL2]

In the same SP3 socket as current chips?

No.

 

[csendesmark]

2 channel memory is going to feed 32 or even 64 cores And some graphics

This my first thought for me as well!
Hope that the Ryzen 9 CPU-s with 24 or 32 cores have extra memory channels as well.

 

[demu]

This my first thought for me as well!
Hope that the Ryzen 9 CPU-s with 24 or 32 cores have extra memory channels as well.

They won't have. They would require a different kind of motherboard than other Ryzens.
Buy a Threadripper if you need more memory channels.

 

[kondamin]

They won't have. They would require a different kind of motherboard than other Ryzens.
Buy a Threadripper if you need more memory channels.

They could do what intel is doing for lunarlake with on package ram but have 4 channels but 2 that go off package and 2 that stay local

 

[SL2]

They could do what intel is doing for lunarlake with on package ram but have 4 channels but 2 that go off package and 2 that stay local

Why? They already have Threadripper. Also, I doubt there's enough room under the hood of an AM5 lid.

 

[Super XP]

ZEN5 should be great, ZEN6 is the one that should offer real generational performance and improvements over its predecessors.
Looking forward to both ZENs anyways.

Why? They already have Threadripper. Also, I doubt there's enough room under the hood of an AM5 lid.

Threadripper isn't for everybody.

 

[SL2]

Threadripper isn't for everybody.

Yeah well neither is 64 cores, or 32.

 

[Super XP]

This my first thought for me as well!
Hope that the Ryzen 9 CPU-s with 24 or 32 cores have extra memory channels as well.

I have to agree cold hardily, its about time AMD moves to Quad-Channel memory over its Dual-Channel they've been using for ages now.

Yeah well neither is 64 cores.

Exactly,

 

[SL2]

Exactly,

Do you know what neither means lol

 

[Battler624]

that's kind of awesome. Kind of a big jump if zen 5 is 8 cores tho.

Zen5 is 8 Cores and so is Zen6 (afaik)
This is about Zen6c, Zen4c is already 16cores per CCD, Zen6c will double it.

I have to agree cold hardily, its about time AMD moves to Quad-Channel memory over its Dual-Channel they've been using for ages now.


Exactly,

He's saying 64 cores aren't for everybody just like threadripper.

 

[kondamin]

Zen5 is 8 Cores and so is Zen6 (afaik)
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.

64 cores might not be for everybody right now.
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

 

[Darksword]

I was hoping Zen 5 would be 16 cores per CCD, but oh well. Patiently waiting for a 9800X3D to replace my aging 10900K.

 

[b1k3rdude]

So pointless for average consumers then.

 

[Denver]

That could theoretical bring 32 cores and even 64 cores to am5 socket with zen 6.

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.

The rumor points to CCDs with up to 32 cores, it means that there are CCDs with 16/8 cores.

Perhaps AMD will raise the bar to 32 cores in Ryzen 9.