Discussion Speculation: Zen 4 (EPYC 4 "Genoa", Ryzen 7000, etc.)

[Vattila]

Except for the details about the improvements in the microarchitecture, we now know pretty well what to expect with Zen 3.

The leaked presentation by AMD Senior Manager Martin Hilgeman shows that EPYC 3 "Milan" will, as promised and expected, reuse the current platform (SP3), and the system architecture and packaging looks to be the same, with the same 9-die chiplet design and the same maximum core and thread-count (no SMT-4, contrary to rumour). The biggest change revealed so far is the enlargement of the compute complex from 4 cores to 8 cores, all sharing a larger L3 cache ("32+ MB", likely to double to 64 MB, I think).

Hilgeman's slides did also show that EPYC 4 "Genoa" is in the definition phase (or was at the time of the presentation in September, at least), and will come with a new platform (SP5), with new memory support (likely DDR5).

What else do you think we will see with Zen 4? PCI-Express 5 support? Increased core-count? 4-way SMT? New packaging (interposer, 2.5D, 3D)? Integrated memory on package (HBM)?

Vote in the poll and share your thoughts!

 

[Exist50]

It was mentioned at the FAD earlier this year:

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Nice catch. They could probably split out some IO or even graphics without too much issue.

 

[FangBLade]

7950X vs 12900X is just Spite...

View attachment 66762

View attachment 66763

Damn, that's huge lead, and about gaming I perversely fantasize about 3d version gaming performance.

 

[Saylick]

I'll have to say one thing: if those slides are indeed the ones they use for the launch presentation, I don't think people should be doubting AMD when it comes to their ability to sandbag in the future. I say this knowing that there's a chance AMD might tease RDNA 3 as well, and whatever numbers they give for that, if any, will have conservatism baked in, just like they've done so far for everything else.

 

[moinmoin]

I'll have to say one thing: if those slides are indeed the ones they use for the launch presentation, I don't think people should be doubting AMD when it comes to their ability to sandbag in the future.

People won't stop sandbagging AMD.

 

[nicalandia]

Damn, that's huge lead, and about gaming I perversely fantasize about 3d version gaming performance.

3D v-cache vs Zen3



Zen4 vs Zen3



On the Same Game that 7950X just murders the X3D part

 

[Zucker2k]

3D v-cache vs Zen3

View attachment 66767

Zen4 vs Zen3

View attachment 66768

On the Same Game that 7950X just murders the X3D part

Same graphics card and drivers?

 

[Asterox]

Lol, AMD again hide the real IPC number for new CPU.

- older slide 8-10% higher IPC for Zen4
- now 13% higher for Zen4

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[Zucker2k]

Don't know if I missed it, but is there an efficiency slide of 5950x vs 7950x? Should be telling.

 

[Timmah!]

3D v-cache vs Zen3

View attachment 66767

Zen4 vs Zen3

View attachment 66768

On the Same Game that 7950X just murders the X3D part

How do you know its X3D part. Maybe its vanilla Zen3.

 

[inf64]

https://twitter.com/x/status/1564373867300171776

Pretty good for a new generation

That's something we've already discussed here https://forums.anandtech.com/thread...ryzen-7000-etc.2571425/page-242#post-40778044

At the end of the day, it's the net performance and perf./watt that matters.

From Zen2 (3950X)->Zen3 (5950X) we had 24% ST uplift, 15% MT uplift, and 32% gaming uplift.
Reference: https://www.computerbase.de/thema/prozessor/rangliste/#abschnitt_die_computerbaseperformanceratings

From Zen3->Zen4, we potentially have ~28% maximum ST uplift (~5.8Ghz, +10% IPC), >36% MT uplift (~>5.2Ghz? all core turbo, +10% IPC), and potentially ~30% gaming uplift (~5.35Ghz gaming all core boost?, +10% IPC). "

Basically nailed to the percent

Edit: From May 26, I guessed the IPC (13%) correctly

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[desrever]

Weird that they pricing higher core count parts cheaper per core than lower core count parts with the 7950x being the cheapest in core/$. Guess AMD really want to upsell anyone who want to buy one.

 

[nicalandia]

Don't know if I missed it, but is there an efficiency slide of 5950x vs 7950x? Should be telling.

No, just against 12900k

 

[Markfw]

Lol, AMD again hide the real IPC number for new CPU.

- older slide 8-10% higher IPC for Zen4
- now 13% higher for Zen4

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On ES chips, beta bios, etc... They do their best, and estimate low at first, so it does not look as bad if thats all it does.

 

[nicalandia]

How do you know its X3D part. Maybe its vanilla Zen3.

The X3D was the Official AMD Slide of Zen3 vs Zen3 With 3D V Cache. The 7950X is vs 5950X. So the 7950X

 

[nicalandia]

On ES chips, beta bios, etc... They do their best, and estimate low at first, so it does not look as bad if thats all it does.

Under Promise and Over Deliver is what Dr. Lisa Su has been about

 

[Saylick]

People won't stop sandbagging AMD.

As long as it's AMD's competitors, that's fine by me. They can underestimate Lisa Su and the team all they want. It won't do them any good.

 

[eek2121]

PSA: X3D parts won't be announced until (well) after Raptor Lake.

EDIT: Also, nice one AMD.

 

[Vope45]

PSA: X3D parts won't be announced until (well) after Raptor Lake.

A little birdie told me it's gonna be the same day.

 

[FangBLade]

Judging by this leak they won't need 3d version for ADL, it will be their trump card against RPL.

 

[nicalandia]

PSA: X3D parts won't be announced until (well) after Raptor Lake.

As expected. Dr. Lisa Su just wants to make it clear that they now control Gaming.... 7950X will just steamroll the 12900K/KS. when Intel release the Raptor, then Bam the X3D parts just to remind people on Who is Gaming King

 

[Paul98]

13% IPC Uplift and 5.7Ghz boost

 

[Markfw]

from the anandtech web site: The actual launch date of AMD's new platform won't be until sometime in the fall, somewhere between 4 and 7 months from now. "

Thats really bites.....

 

[Det0x]

 

[moinmoin]

Like I said, the Borderlands 3 and CS:GO numbers are literally fake. Doesn't make any sense.

That was a good call!

 

[inf64]

2275pts in GB5 for ST (7950X)!