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

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techjunkie123

Member
May 1, 2024
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Yeah, also the leaked numbers from the AMD event were 42k stock and 44k PBO. No way this ES does 46k. Something is off.

I know AMD says it is better, but 7950X ran at 95° pretty much everywhere. There's no way we are sitting at 60° now with 9950X. Also the numbers are higher than the leaked PBO ones.

All the numbers are quite consistent w.r.t. PPC. The stock AMD run had a score of 42k at 5.0 GHz, the ES is 46k at 5.28 GHz, and the mild OC AMD (on LN2) is 51k at 5.85 GHz all core.
 

uzzi38

Platinum Member
Oct 16, 2019
2,705
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Hassan (yeah I know, I know) did allude to GNR being unusually cool in one of his tweets.
Not Tweets, an article.

AMD's Ryzen 9000 "Zen 5" CPUs by default will run cooler than Ryzen 7000 "Zen 4" CPUs. Based on testing with a Ryzen 9 9950X CPU (Default ES), the chip consumed up to 190W of power whereas the Ryzen 9 7950X consumes around 220-ish Watts of power in the same workloads. The workload being performed here is Cinebench R23 and we got some interesting numbers here too. The 9950X is almost as fast as the Core i9-14900KS by default and that chip can consume over 300W of power with its extreme profile.

The slightly under 42K points at stock matches this performance level.

Interestingly it does look like Zen 5 needs more current than Zen 4 at the same power levels. Even at 230W you almost can't get Zen 4 to hit the stock 160A TDC limit, but here you can see it's being exceeded.
 

Hail The Brain Slug

Diamond Member
Oct 10, 2005
3,485
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I'll try my best

Do ones for 253W and Unlimited too.
This is gonna take some time with so many different PPT levels to bench. I think I need to do 80, 100, 120, 160, 200, 230, 253, and unlimited. 253 and unlimited will do nothing because it doesn't even hit the 230W PPT cap at stock, but I'll run them anyway.
 

Philste

Senior member
Oct 13, 2023
250
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All the numbers are quite consistent w.r.t. PPC.
But it doesn't make sense that stock ES is better than PBO scores that AMD shows officially. Also

AMDs slide says Ryzen 9000 is 7° cooler at same power. And now this ES runs at 230W with 60°?!?. 7950X needed a chiller to even get to 230W at 95°. Most reviews with AIO measured a Max powerdraw of 190-200W for 7950X because it simply ran into the 95° Limit. So this ES looks to be more like 40-45° cooler at same power. Very suspicious.
 

CouncilorIrissa

Senior member
Jul 28, 2023
520
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But it doesn't make sense that stock ES is better than PBO scores that AMD shows officially. Also

AMDs slide says Ryzen 9000 is 7° cooler at same power. And now this ES runs at 230W with 60°?!?. 7950X needed a chiller to even get to 230W at 95°. Most reviews with AIO measured a Max powerdraw of 190-200W for 7950X because it simply ran into the 95° Limit. So this ES looks to be more like 40-45° cooler at same power. Very suspicious.
I wonder if there's some weird offset that causes the temps to be reported N degrees lower than they actually are.
 

StefanR5R

Elite Member
Dec 10, 2016
5,891
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There is no reason to marvel over these temperature readouts (from an ES, to boot).

And now this ES runs at 230W with 60°?!?
Have you ever seen temperature readouts of EPYC chips @400 W under decent air cooling? Let alone water cooling.

CPU temperature readouts are sensitive to
  • where they are measured (edit, since temperature is not uniform over the die),
  • at which clock speed the spot which is measured is driven (edit, since logic uses nonlinearly more power at increased clock speed), and
  • how the firmware translates measurements to user-exposed values.¹

yeah, low wattage runs report temperatures in the low 30s, that's impossible.
Do you happen to know the ambient temperature which the leaker maintained?

Edit:
¹) Many of you will remember that AMD once did something else: Let the CPU firmware report stupidly increased temperature values, so that cooler fans tend to spin faster.

Edit 2:
Who of you has ever soldered his own temperature sensor onto the naked die in order to learn the "real" temperature of his CPU?
 
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