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

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Gideon

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Nov 27, 2007
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There are some new Geekbench 6 results for AMD Ryzen 9 9900X (link):

View attachment 102582

It looks pretty good
Just came to post it. This looks to finally be retail silicon.

The clocks are sky-high though. Essentially 5.65Ghz the entire run (usually there is some fluctuation).

If this is stock perf, it looks quite decent. Nothing out of this world though
 

Hail The Brain Slug

Diamond Member
Oct 10, 2005
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I don't see 7900X Linux scores 10% higher than Windows one. But I might be missing something; looking into GB database is such a pain
Earlier in the thread I demonstrated a 5-6% ST uplift from W11 to Linux on my 7950X.

5% on Debian, 6% on Manjaro (Arch)

 
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Nothingness

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Jul 3, 2013
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Hail The Brain Slug

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Oct 10, 2005
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If you look at the result @yuri69 posted above you can guess
The largest outlier is Object Remover.
Yeah but how much does the weighting of the tests meaningfully affected change the actual score? We'd need a run with and without AVX512 enabled to really know.

I could do that on my 7950X but I'm not sure how valuable it would be over having a Zen 5 sample to run.
 

Nothingness

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Jul 3, 2013
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Yeah but how much does the weighting of the tests meaningfully affected change the actual score? We'd need a run with and without AVX512 enabled to really know.

I could do that on my 7950X but I'm not sure how valuable it would be over having a Zen 5 sample to run.
Indeed. But that still helps estimating what the improvements are for tests that don't benefit from AVX-512. And here clang is a bit of a disappointment while HTML5 is a surprise. Let's wait a few more days to get a more accurate picture.
 

Nothingness

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Jul 3, 2013
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Isn't clang going to need compiler patches for Zen 5 support? That also means that GB6 may need a revision.
Do you realize that'd mean all legacy code would need recompilation to be fast on Zen5?

That's not how things work. And that's why OoOE is required to have a fast CPU (until things change dramatically in the HW/SW space...): to let a beefed up core benefit from its extra ressources without having to recompile everything. And all modern CPU are good at that.

I can't remember when was the last time, recompiling with instruction scheduling for native CPU brought any significant speedup (>2%, that is not in measurement noise) for code I run. Of course native instruction selection is a different story but that doesn't apply to clang.
 

inf64

Diamond Member
Mar 11, 2011
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A bit unrelated, but does mention Zen 5 :

The slide AMD used shows the previously disclosed IPC figure, so it seems they are sticking to it
 

Hail The Brain Slug

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Oct 10, 2005
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Indeed. But that still helps estimating what the improvements are for tests that don't benefit from AVX-512. And here clang is a bit of a disappointment while HTML5 is a surprise. Let's wait a few more days to get a more accurate picture.

W10 AVX 512 on/off. Hardly any difference. Ignore comparison to previous W11 scores, W10 seems to score slightly better for ST.
 
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