Discussion Zen 5 Speculation (EPYC Turin and Strix Point/Granite Ridge - Ryzen 9000)

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Joe NYC

Platinum Member
Jun 26, 2021
2,456
3,316
106
The first quote says AMD ought to release Zen5X3D as soon as the chip is ready. But then the second quote says the regular Zen5 was ready already in early 2023, but is not released until now in July 2024.

So in that case why use differt policy for Zen5 vs Zen5X3D? Why not release both as soon as possible after they are ready?

Zen 5 validation was likely far more involved than previous gens, because of the scope of changes and likely, re-write of most of the internal micro code.

In the meantime, the part of the team designing new silicon likely moved to Zen 6.

Also, since Zen 5 reuses Zen 4 IOD, that team may have moved to new Zen 6 style IOD (or Strix Halo).

(For regular Zen5, I know there is some lead time from A0 silicon until actual release is possible. But it ought to be much shorter than from early 2023 until now.)

Yeah, that's the basis of my speculation

For the first bullet, do you mean just frequency bumps or did you have something else in mind?

Could be frequency, could be something to do with V-Cache, or ability to work with higher power envelope for greater all core frequency.

If these later steppings (B0, C0) exist, they exist for a reason. We just don't know what it is.

BTW, it could very well be that these 3 steppings are for:
- desktop
- server
- Strix Halo
- Mi350a

For the second bullet, would that mean Zen6 release in like 12-18 months from now, so mid-life kicker is not needed?

Yeah, that may be a possibility. If Zen 6 can be released by the end of 2025 or at CES 2026, then there is no reason for any "midlife kicker", since the "midlife kicker" Zen 5 x3d is now speculated to be released in 2024
 
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Timmah!

Golden Member
Jul 24, 2010
1,510
824
136
$899 would the most expensive mainstream consumer product AMD ever sold, $799 is more than the MSRP for 7950X.

The 7950X is going for <$500 right now, nobody is going to pay >50% more for a 15% performance increase.
7950x was 699 at launch IIRC and i bought it in December, about 3 months till official release, already for 100 less. There were reasons for that, cpus not selling that well cause of the high price of the new AM5 platform overall, which wont repeat this time around, but as other people said, its not that much faster to separate itself at the top for significantly higher prices to be justifiable. IMO the one reason why the CCDs are the same size as Zen4 and only transistor count increase comes from the newer denser process, is cause AMD dont thinks they can sell more expensive than Z4 and wont be giving any additional performance increase for “free” - as in potentially bigger CCDs could have been even faster, but AMD would expect to be paid for every additional mm2, and people would not be willing to pay….

Or i am completely wrong and its the same size cause any bigger would not fit under IHS
 
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Jul 27, 2020
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Or i am completely wrong and its the same size cause any bigger would not fit under IHS
The performance increase in various workloads is great considering the CCD size is about the same. It scales better in MT with additional power, as long as it is properly cooled. They are in a lot better position than Intel. They are dealing with the limits imposed by the laws of physics just like everyone else. Even Apple's design isn't immune to these problems and they have been forced to push their silicon to higher frequencies. Qualcomm can't even get their demoed highest frequency SD Elite X SKUs into WoA laptops, possibly due to yield issues.

The future is going to require ingenious solutions, both at the architecture and process level to get bigger gains. Increasing CCD size is a bad option for AMD since they don't own fabs and don't have "blind" brand loyalty like Intel users so they always have problems selling their CPUs at higher prices, except in the server space where the higher performance at lower power use automatically translates into huge data center cost savings.
 

Josh128

Senior member
Oct 14, 2022
247
373
96
Regarding CapframeX's not so cryptic tweet. I can believe it. The main reason I believe why is the same IOD & memory limitations of Zen 4. When looking at Zen 4 memory scaling testing for games, 4800 to 6000 shows a real, tangible difference due to the increase being in the same 1:1 ratio. Increases from 6000 1:2 to 8000 1:2 are either very small, or nothing at all. When you look at Intel scaling, they seem to achieve that same boost that AMD gets from 4800 to 6000 all the way to 8000+. No matter how good the core, its going to be limited in this regard. Until AMD improve mem controller and subsystem, the will always be behind the 8 ball in this regard.

Second reason is that it seems that most of the gains in the Zen 5 core are floating point, not integer ops. I think David Huangs testing (with Strix, so not definitive as to GNR) showed ~10% gains in SPECint testing. Its said that integer perf is more relevant to games than floating point. I think we are going to see ~10% boost in games vs Zen 4 at same frequency, which would put it behind Zen 4 X3D on average by 5% or more. Zen 4, when it released, got such huge bumps in frequency and memory speeds compared to Zen 3 that it slightly beat 5800X3D on average in large sets (50+) of games. HWUB found the 7600X to be 1%-2% faster than the 5800X3D over a 50 game suite in the testing they did. AMD is claiming +12% over 5800X3D for Zen 5, so the numbers actually work out perfectly for 10% over 5800X3D.
 

Timmah!

Golden Member
Jul 24, 2010
1,510
824
136
The performance increase in various workloads is great considering the CCD size is about the same. It scales better in MT with additional power, as long as it is properly cooled. They are in a lot better position than Intel. They are dealing with the limits imposed by the laws of physics just like everyone else. Even Apple's design isn't immune to these problems and they have been forced to push their silicon to higher frequencies. Qualcomm can't even get their demoed highest frequency SD Elite X SKUs into WoA laptops, possibly due to yield issues.

The future is going to require ingenious solutions, both at the architecture and process level to get bigger gains. Increasing CCD size is a bad option for AMD since they don't own fabs and don't have "blind" brand loyalty like Intel users so they always have problems selling their CPUs at higher prices, except in the server space where the higher performance at lower power use automatically translates into huge data center cost savings.
Yeah, but limiting the size to be about the same is their deliberate decision, and even though the perf increase might be great for that size, its likely limited by that decision to be possibly significantly more.

Regarding scaling better with additional power, granted , it scales where zen4 stopped to scale. The scaling is still rather insignificant, its not like gain additional 50 percent of perf going from 160W to 230. Its maybe 10~15 percent and while thats more than almost nothing before, its still not something extremely impressive, that would take zen5 out of sight of Zen4/RPL perf-wise. And thats really the most important thing imo.
 
Jul 27, 2020
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Regarding scaling better with additional power, granted , it scales where zen4 stopped to scale. The scaling is still rather insignificant, its not like gain additional 50 percent of perf going from 160W to 230. Its maybe 10~15 percent and while thats more than almost nothing before, its still not something extremely impressive, that would take zen5 out of sight of Zen4/RPL perf-wise. And thats really the most important thing imo.
It's just AMD being cautious and not trying to bite off more than they can chew. The X3D is supposed to be the special SKU of this generation. The competition by the end of the year will be super interesting to watch and unless Intel manages some miracle, this will be AMD's year.
 

CouncilorIrissa

Senior member
Jul 28, 2023
517
1,976
96
Finally the GB6 run with Strix boosting properly and it breaks the 2.9k score for the first time.
"frequencies": [
5137,
5137,
5135,
5136,
4914,
4939,
5137,
5135,
5137,
5135,
5137,
5138,
5135,
5138,
5137,
5137,
5136,
5135,
5137,
5134,
5137,
5138,
5135,
5132,
5135,
5137,
5138,
5136,
5134,
5138,
5137,
5138,
5137,
5136,
5099,
5138,
5137,
5136,
5136,
5137,
5138,
5137,
5138,
4966,
5138,
5138,
5136,
5137,
5137,
5136,
5136,
5137
]
 

StefanR5R

Elite Member
Dec 10, 2016
5,881
8,723
136
IMO the one reason why the CCDs are the same size as Zen4 and only transistor count increase comes from the newer denser process, is cause AMD dont thinks they can sell more expensive than Z4 and wont be giving any additional performance increase for “free” - as in potentially bigger CCDs could have been even faster, but AMD would expect to be paid for every additional mm2, and people would not be willing to pay….

Or i am completely wrong and its the same size cause any bigger would not fit under IHS
Yes, you are completely wrong ;-) and it is precisely because bigger CCDs would not fit under the IHS. And by that I refer to 1 sIOD + up to 16 CCDs having to fit under Turin's IHS. Granite Ridge's IHS would certainly have room for a little bigger CCDs still. (Although maybe Granite Ridge and Turin might receive CCDs at differing steppings, I presume that the design is the same, just like it was shared between desktop and server in Zen1...Zen4.)

BTW, it has been speculated here that the density increase of Granite Ridge's CCD vs. Raphael's is not only thanks to the process bump, but also due to denser L3$ by means of tweaks which are not yet clear.
 

Tup3x

Golden Member
Dec 31, 2016
1,060
1,059
136
Finally the GB6 run with Strix boosting properly and it breaks the 2.9k score for the first time.
"frequencies": [
5137,
5137,
5135,
5136,
4914,
4939,
5137,
5135,
5137,
5135,
5137,
5138,
5135,
5138,
5137,
5137,
5136,
5135,
5137,
5134,
5137,
5138,
5135,
5132,
5135,
5137,
5138,
5136,
5134,
5138,
5137,
5138,
5137,
5136,
5099,
5138,
5137,
5136,
5136,
5137,
5138,
5137,
5138,
4966,
5138,
5138,
5136,
5137,
5137,
5136,
5136,
5137
]
Probably high performance mode. That laptop also has high TDP so your typical business laptop is not going to be anywhere close.
EDIT: Well, power plan was indeed set to performance.
 

CouncilorIrissa

Senior member
Jul 28, 2023
517
1,976
96

Philste

Senior member
Oct 13, 2023
246
438
96
Finally the GB6 run with Strix boosting properly and it breaks the 2.9k score for the first time.
This should be the final score. David Huang got exactly 3k for the 5.0GHz SKU at Linux. Linux typically has 5% advantage, so it adds up exactly. Also the newest Lunar Lake result has basically exactly the same per clock performance.
 
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gaav87

Member
Apr 27, 2024
108
143
76
I don't see any gaming numbers in your message.

CapFrameX is on the same level as userbenchmark with regards to AMD. Best to ignore both unless you want to read something really wrong and misleading.
Quick search seems to suggest that yes, they are Userbenchmark-lite, if you will.
Speaking of UB. What will the poor chap do when zen5 hits and is faster in every single of his tests ? xD Will he sort the CPU's by his ranking this time ? xD
 
Jul 27, 2020
19,385
13,290
146

Focusing on the MT tests and keeping in mind that the Ryzen has 33% fewer threads:

File compression: Good
Navigation: Decent
HTML Browser: Almost on par
PDF renderer: Very good
Photo Library: Good
Clang: OK (was expecting better here)
Text processing: Outstanding
Asset compression: Good
Object detection: Good
Background blur: Outstanding
Horizon detection: Good
Object remover: Good
HDR: Very good
Photo filter: Good
Raytracer: Good
Structure from Motion: Good

In ST, the Ryzen knocks it out of the park in HDR, Object detection and text processing while being decent in Clang, PDF renderer and HTML5 browser.

Excellent MT performance against Intel despite only 24MB L3 cache.
 
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