AMD Epyc Genoa series leaks: introducing 96-core and 84-core CPUs

[mongeese]

In context: Late last year, AMD announced the fourth-gen Epyc series, codenamed Genoa. It's now escaped from AMD's labs and is passing through the hands of leakers before it can make its way onto the open market in the coming months.

According to AMD CEO Lisa Su's keynote last year, Genoa processors should have up to 96 cores based on the Zen 4 architecture and use the TSMC 5nm node. They're supposed to have twice the density and power efficiency of their preceding series, Milan, and 25% more performance overall.

Yuuki Ans, a prolific leaker in the high-performance compute sector, has revealed a spreadsheet containing some of the specs of eighteen models. His leaks seem to come from AMD's partners and are usually good, but the finer details, like clock speeds and TDPs, aren't final yet and could change.

Some processors are only referred to as engineering samples, abbreviated as ES in the tables below. In cases where P and non-P models have identical specs, the two versions are condensed into one row.

8-12 chiplets

Model	Cores / Threads	Base Clock Speed	TDP	L3 Cache
Epyc 9654P	96 / 192	2.00 - 2.15 GHz	360W	384 MB
ES	96 / 192	2.00 - 2.15 GHz	320 - 400W	384 MB
ES	84 / 168	2.00 GHz	290W	384 MB
Epyc 9534	64 / 128	2.30 - 2.40 GHz	280W	256 MB
ES	64 / 128	2.50 - 2.65 GHz	320 - 400W	256 MB

As you'd expect, higher core counts are met with higher TDPs and lower base clocks. In this bracket, Genoa has similar base clocks to Milan but higher TDPs, even for the 64-core models.

4-6 chiplets

Model	Cores / Threads	Base Clock Speed	TDP	L3 Cache
Epyc 9454(P)	48 / 96	2.25 - 2.35 GHz	290W	256 MB
ES	48 / 96	3.20 - 3.40 GHz	360W	256 MB
Epyc 9354(P)	32 / 64	2.75 - 2.85 GHz	280W	256 MB
ES	32 / 64	3.20 - 3.40 GHz	320W	256 MB
ES	32 / 64	2.70 - 2.85 GHz	260W	256 MB
Epyc 9334	32 / 64	2.30 - 2.50 GHz	210W	128 MB

Genoa's mid-tier models are clocked far above Milan's, but they also have higher TDPs. Whereas Milan's 48-core and 32-core models were capped at 280W, Genoa's blast past that and exceed 300W.

2-3 chiplets

Model	Cores / Threads	Base Clock Speed	TDP	L3 Cache
Epyc 9274F	24 / 48	3.40 - 3.60 GHz	320W	256 MB
Epyc 9254	24 / 48	2.40 - 2.50 GHz	200W	128 MB
Epyc 9224	24 / 48	2.15 - 2.25 GHz	200W	64 MB
Epyc 9174F	16 / 32	3.60 - 3.80 GHz	320W	256 MB
Epyc 9124	16 / 32	2.60 - 2.70 GHz	200W	64 MB

Genoa presents some good options at this level, like 24-core and 16-core models equipped with 256 MB cache and base clocks reaching 3.5 GHz. However, they continue the trend of consuming more power than their predecessors. For comparison, Milan's 64-core models had TDPs below 300W, but Genoa's 16-core models reach the 320W threshold.

To power them, Genoa has a new socket called SP5. It can handle up to 700W and will also support Genoa's counterpart for the cloud, Bergamo. Additionally, it supports new features, including 12-channel DDR5 and PCIe 5.0.

Genoa is scheduled for this year and could arrive soon. Bergamo should arrive in the first half of next year.

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https://www.techspot.com/news/95240-amd-epyc-genoa-series-leaks-introducing-96-core.html

 

[yRaz]

Look at all that cache... It'd be interesting to see would happen if AMD stacked up the cache to over a gig.

 

[hahahanoobs]

Look at all that cache... It'd be interesting to see would happen if AMD stacked up the cache to over a gig.

That would obviously depend on if it was useful, cost and how it would effect the rest of the chip.

 

[Morphine Child]

Somehow you just gotta respect that... 96 cores on a single chip, absolute insanity.

 

[yRaz]

That would obviously depend on if it was useful, cost and how it would effect the rest of the chip.

that would obviously be why I think it would be interesting

 

[Puiu]

The increased TDP might just be a result of market demand. It's what sells and what data centers want (and can handle). Considering the fact that these CPUs can be configured to run at a lower TDP for just a small drop in clock speed, I don't think it will be a problem.

 

[zamroni111]

The increased TDP might just be a result of market demand. It's what sells and what data centers want (and can handle). Considering the fact that these CPUs can be configured to run at a lower TDP for just a small drop in clock speed, I don't think it will be a problem.

700w for 96 cores is very efficient.
Definitely much more efficient than what Intel can offer

 

[Mr Majestyk]

128 core Bergamo next year, but the real nail in Intel's coffin is Zen 5's Epyc Turin cpu's that will hit 256 cores with Zen 6 Epyc possibly hitting 512 cores. I shudder to think of the TDP though.

 

[ypsylon]

Well 320W TDP is rather excellent with such humongous cache sizes. It's quite remarkable progressive scaling compared to previous generations.

If AMD decides to go with Threadripper (in whatever form), then I sincerely hope they'll start with 16 cores model. I guess AMD will target same 320W power envelope for TR because of bump on the clocks to 3.8-4GHz.

 

[Puiu]

128 core Bergamo next year, but the real nail in Intel's coffin is Zen 5's Epyc Turin cpu's that will hit 256 cores with Zen 6 Epyc possibly hitting 512 cores. I shudder to think of the TDP though.

128 full cores with Zen4c will be incredible MT performance even though ST will suffer. I really want to see some benchmarks for it.

 

[wiyosaya]

Well 320W TDP is rather excellent with such humongous cache sizes. It's quite remarkable progressive scaling compared to previous generations.

If AMD decides to go with Threadripper (in whatever form), then I sincerely hope they'll start with 16 cores model. I guess AMD will target same 320W power envelope for TR because of bump on the clocks to 3.8-4GHz.

My guess is that a 16-core TR will be unlikely as that will compete with their Ryzen line, and they backed away from doing that in the last generation already.

 

[zamroni111]

Well 320W TDP is rather excellent with such humongous cache sizes. It's quite remarkable progressive scaling compared to previous generations.

If AMD decides to go with Threadripper (in whatever form), then I sincerely hope they'll start with 16 cores model. I guess AMD will target same 320W power envelope for TR because of bump on the clocks to 3.8-4GHz.

You can use epyc for workstation too.
Super micro atx motherboard for epyc is just 700 dollars

 

[zamroni111]

128 full cores with Zen4c will be incredible MT performance even though ST will suffer. I really want to see some benchmarks for it.

Even if single thread performance is still behind Intel, multi thread performance actually matters most for server.

In benchmarks tool's single thread test, only 1 core is busy while other cores are almost idle so the resources are effectively usable by single core.

This situation will never happen in real production servers during peak traffic and we do sizing based on peak traffic.

 

[yesnt]

My guess is that a 16-core TR will be unlikely as that will compete with their Ryzen line, and they backed away from doing that in the last generation already.

Some use cases need tons of memory and more PCIe than Ryzen can deliver. I don't see 16 core TR really competing with Ryzen.

 

[zamroni111]

Some use cases need tons of memory and more PCIe than Ryzen can deliver. I don't see 16 core TR really competing with Ryzen.

If thread ripper isn't available, then use epyc with $700 super micro ATX motherboard