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

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eek2121

Diamond Member
Aug 2, 2005
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Now fix the single core boost regression from non 3d part and there's your 3rd gen v-cache.
Based on what we’ve seen, the lower clocks were intentional, NOT a regression. AMD doesn’t want these things stepping on the 12-16 core parts. That is why they are clocked lower.

We also now can see that Zen 5 is memory bandwidth starved.
 

MrTeal

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Dec 7, 2003
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Given how Zen5 compares to Zen4 in the standard parts, I would imagine if you limited the 9800X3D to a similar power envelope as the 7800X3D you'd get much closer performance. Probably still better in gaming since it could clock one or two cores higher if needed within that envelope, but probably not the runaway it is now.

That being said the 7800X3D is an awesome and efficient chip, but 100ish W for the 9800X3D really isn't out of line for a top end gaming CPU and is still well within the envelope for a normal PSU and decent low cost air cooler. I'd imagine the vast majority of buyers are fine with the tradeoff.
 

Abwx

Lifer
Apr 2, 2011
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Given how Zen5 compares to Zen4 in the standard parts, I would imagine if you limited the 9800X3D to a similar power envelope as the 7800X3D you'd get much closer performance. Probably still better in gaming since it could clock one or two cores higher if needed within that envelope, but probably not the runaway it is now.
The V-cache may use something like 10W, at 65W TDP/88W PPT it wouldnt be an accurate comparison with a stock 9700X, you ll have to set the X3D chip at 75W TDP/98W PPT to have the same cores power.
 

DAPUNISHER

Super Moderator CPU Forum Mod and Elite Member
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MrTeal

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Dec 7, 2003
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The V-cache may use something like 10W, at 65W TDP/88W PPT it wouldnt be an accurate comparison with a stock 9700X, you ll have to set the X3D chip at 75W TDP/98W PPT to have the same cores power.
I wasn't talking about comparing it to a 9700X, I was talking about the 7800X3D. The 7800X3D is also a 120W chip, but practically never gets there because of the thermal limits of its vcache structure.
Set both to 65W to normalize power, and then compare.
 

biostud

Lifer
Feb 27, 2003
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Given how Zen5 compares to Zen4 in the standard parts, I would imagine if you limited the 9800X3D to a similar power envelope as the 7800X3D you'd get much closer performance. Probably still better in gaming since it could clock one or two cores higher if needed within that envelope, but probably not the runaway it is now.

That being said the 7800X3D is an awesome and efficient chip, but 100ish W for the 9800X3D really isn't out of line for a top end gaming CPU and is still well within the envelope for a normal PSU and decent low cost air cooler. I'd imagine the vast majority of buyers are fine with the tradeoff.
Yeah, no problems found, still very efficient compared to more or less every other chip except the 7800X3D.

If anything they should simply have launched the regular zen5 as non-X parts if they wanted to launch them at a 65W envelope.
 

Abwx

Lifer
Apr 2, 2011
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I wasn't talking about comparing it to a 9700X, I was talking about the 7800X3D. The 7800X3D is also a 120W chip, but practically never gets there because of the thermal limits of its vcache structure.
Set both to 65W to normalize power, and then compare.

In this case you wont gain much with Zen 5, at same cores power the 9800X3D has to be clocked slightly lower due to better IPC, or at best it will end at same frequency.

So far at Computerbase they have the 7800X3D 19% more efficient in games, lower perfs but with an average of 61W vs 83W for the 9800X3D.

 

coercitiv

Diamond Member
Jan 24, 2014
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If anything they should simply have launched the regular zen5 as non-X parts if they wanted to launch them at a 65W envelope.
Imagine launching 9600 > 9950 with vanilla cores and lower TDP and then coming with 9700X > 9950X with vcache and higher TDP. Nah, lineup too simple, consumers need more bigger longer ultra AI names.
 

Josh128

Senior member
Oct 14, 2022
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