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Message boards :
Number crunching :
Ryzen 7xxx series specs - post it here
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No doubt someone here is going to buy one of these soon. Like others, I can't wait to see how AVX-512 goes in one of these. It will surely CRUSH some prime times.
Dump your findings here for all to admire! :D
The TdP next year is going to be a doozy!
TIA
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mackerel Volunteer tester
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Also looking forward to some data relevant to PrimeGrid. There is a good writeup on Zen 4's AVX-512 implementation at https://www.mersenneforum.org/showthread.php?t=28102, although with the data available there it is hard to make solid predictions on PrimeGrid expectations.
Based on what's been seen, I'd expect architecture performance somewhere above that of Rocket Lake - Intel 11th gen which is the only consumer desktop generation to officially feature AVX-512. Zen 4 should have some gains from having a more modern architecture, more cache, and more clock. I never had data for Alder Lake, early samples of which could get AVX-512 enabled but it was unsupported by Intel and disabled in later production runs.
If anyone does have a Zen 4 system, I'd be interested in seeing a Prime95 benchmark run on it, at 256k FFT as it provides a nice reference for core operation without being memory limited. | |
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There are already some 7950s floating around PrimeGrid. E.g. http://www.primegrid.com/show_host_detail.php?hostid=1163535
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 mikey
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There are already some 7950s floating around PrimeGrid. E.g. http://www.primegrid.com/show_host_detail.php?hostid=1163535
That person is running TRP tasks in about 8,965.53 seconds using 4 cpu cores at a time, that thing is FAST!! | |
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288larssonVolunteer tester
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Hi my 7950 runs CPU ppt limit 140w =190w at wall.
PPSE (LLR) Elapsed time (avg) 360 seconds
PPS-Mega (LLR) Elapsed time (avg) 1670 seconds
The Riesel Problem (LLR Elapsed time (avg) 16425 seconds using 4 cpu cores at a time
Prime95 64-bit version 30.8, RdtscTiming=1
Timings for 240K FFT length (8 cores, 8 workers): 0.37, 0.37, 0.37, 0.37, 0.37, 0.37, 0.37, 0.37 ms. Throughput: 21517.66 iter/sec.
Timings for 240K FFT length (16 cores, 16 workers): 0.43, 0.42, 0.42, 0.43, 0.42, 0.42, 0.42, 0.42, 0.43, 0.43, 0.43, 0.44, 0.43, 0.43, 0.43, 0.43 ms. Throughput: 37418.08 iter/sec.
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mackerelVolunteer tester
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Timings for 240K FFT length (8 cores, 8 workers): 0.37, 0.37, 0.37, 0.37, 0.37, 0.37, 0.37, 0.37 ms. Throughput: 21517.66 iter/sec.
Timings for 240K FFT length (16 cores, 16 workers): 0.43, 0.42, 0.42, 0.43, 0.42, 0.42, 0.42, 0.42, 0.43, 0.43, 0.43, 0.44, 0.43, 0.43, 0.43, 0.43 ms. Throughput: 37418.08 iter/sec.
Thanks! That's some interesting data there. Any idea what typical clocks where under those conditions? Presumably higher clock under 8 core vs 16 core load (around 15% based on results). Normalising per (active) core, that's 2690 and 2339 iter/sec respectively.
For comparison, my 7920X (Skylake-X) does 20321 for 12 cores at 2.9 GHz, or 1693 per core, 584 per core, per GHz.
On my 11700k (Rocket Lake), it scores 11850 for 8 cores, or 1481/core. At around 4.2 GHz that makes it 353 per core per GHz.
I don't want to estimate a clock normalised value without knowing the actual clocks, but it seems to put Zen 4 architecture between Rocket Lake and Skylake-X, keeping in mind Skylake-X has a more powerful AVX-512 implementation than either of these mainstream consumer CPUs. However the much higher clocks would make Zen 4 win overall if you just want to do as much work as possible. | |
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288larssonVolunteer tester
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hi
(8 cores, 8 workers) around 4.7 GHz
Timings for 240K FFT length (16 cores, 8 workers): 0.32, 0.24, 0.31, 0.27, 0.25, 0.29, 0.28, 0.26 ms. Throughput: 29265.01 iter/sec.
(16 cores, 16 workers) around 4.4 GHz
edit (8 cores, 8 workers) got better after a second run | |
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mackerelVolunteer tester
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(16 cores, 16 workers) around 4.4 GHz
That would put Zen 4's per core, per clock performance (532) very close to Skylake-X (584). Very impressive.
If they bring out a 7700X3D in the not too distant future that'll be my CPU of choice for my next build. | |
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Ryzen 7xxx series specs - post it here |
