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

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Hail The Brain Slug

Diamond Member
Oct 10, 2005
3,474
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I wonder whether he reset the stats or if these surprisingly low temps are legit. If so, then it can do much more with more watts or static OC
1.163vcore is pretty low, there's no telling how different his stats are from a retail sample since he has some unknown PBO+CO config (and custom water cooling).

My 7950X at 230W PPT was over 1.2vcore and that was after hitting thermal limit and stepping down a bit due to air cooler. At stock when it was on custom water it would not exceed high 80C, and that would have been even higher vcore than on my air cooler since it was not stepping down at all, just going full tilt.
 

deasd

Senior member
Dec 31, 2013
566
910
136

9950x ES vs 7950x

Classroom: 21.1%
Junkshop: 26.7%
Monster : 18.4%

Average: 22.1%




I think it's safely bet that Zen5 has larger realworld IPC uplift than Zen2-Zen3 iteration at least in FP performance. 5950x is only 13% faster than 3950x in blender database, and only 9% faster in computerbase test:

 
Last edited:

Abwx

Lifer
Apr 2, 2011
11,514
4,299
136
9950x ES vs 7950x

Classroom: 21.1%
Junkshop: 26.7%
Classroom: 18.4%

Average: 22.1%

View attachment 102891View attachment 102892View attachment 102893


I think it's safely bet that Zen5 has larger realworld IPC uplift than Zen2-Zen3 iteration at least in FP performance. 5950x is only 13% faster than 3950x in blender database, and only 9% faster in computerbase test:


The score of the 13900K here is at 350W or so, no way it can be that close of the 7950X if set at 253W.

Computerbase has the 7950X 11% faster in Blender than the power unlimited 14900KS (330W in CB) and 17% faster than a stock 13900K.

 

Abwx

Lifer
Apr 2, 2011
11,514
4,299
136
A 8000 MT/s run.

Slightly better run on the same hardware :

 

Hitman928

Diamond Member
Apr 15, 2012
6,019
10,339
136
4208 is ether PPT frequency and in that case this should be the Global Frequency, or if global frequency is still 4850 the only limits remain are L3.
But it seems, either SMU or HWinfo reporting Global limit incorrectly.

Hmm. Still don't really know what you mean.

Global limit is 5.85 GHz, same as the 7950x. The L3 cache runs at the same frequency as the cores for Ryzen CPUs, so there's no separate limit.
 
Jul 27, 2020
19,594
13,435
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Will the chipset actually make a difference for memory speeds? I've heard both, but I thought the CPU memory controller was the limitation.
Possibly the X870 chipset/UEFI might be configured out of the box to juice the Zen 5 IMC with more volts, enabling it to sustain higher speeds with compatible EXPO kits. And if that's true, the typical 7950X IMC may not be able to tolerate that high a voltage.
 
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