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Old 2018-03-19, 21:12   #1
Prime95
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Default Ryzen help

Are there any Ryzen owners willing to help (run benchmarks) someone working on theories for optimal Ryzen coding techniques?

I've worked with this person in the past and he has provided useful insights into past AMD architectures. Whether any of his findings will prove at all useful is not known. Like Intel chips, Ryzen is memory bound so code optimizations are likely to produce only minimal improvements.

PM me with you email address if you are interested and I will forward your contact info.
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Old 2018-03-20, 02:42   #2
airsquirrels
 
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Shoot me an email, I’ve got a few variants.
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Old 2018-03-20, 05:03   #3
Prime95
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Thanks
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Old 2018-03-20, 19:23   #4
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Since Threadripper is a "Double Ryzen", is that interesting, too? If yes, I can help.
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Old 2018-05-13, 19:16   #5
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Any news on Ryzen optimizations? I am thinking about upgrading from an old Intel CPU as well.
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Old 2018-05-13, 19:52   #6
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About a year ago the situation wasn't looking so good for Ryzen 7 in terms of Prime95 performance (moslty due to their halved AVX2 throughput):

http://mersenneforum.org/showpost.ph...&postcount=753

If your primary goal for a new PC is running Prime95, than a Skylake/Kabylake/Coffee Lake will perform considerably better.
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Old 2018-05-13, 20:26   #7
Prime95
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Quote:
Originally Posted by VictordeHolland View Post
If your primary goal for a new PC is running Prime95, than a Skylake/Kabylake/Coffee Lake will perform considerably better.
I believe both are limited by memory bandwidth. Just remember to compare 8-core Ryzens to 4-core Intels.
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Old 2018-05-13, 23:10   #8
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More memory channels (4 instead of 2), and the fastest RAM one can lay hand on does a lot to unleash the true potential of current high end CPUs. With 2 memory channels, 3200 MHz is a good aim point for RAM.

I dropped out from running AMD CPUs after many years, when I got my current system. Ryzen was in its early versions, and Kaby Lake had not quite made it to the stores. I am happy with the 6700K I am running

I have always wanted AMD to hang in there, at least to keep pressure on Intel. I would love to see a genuine breakthrough architecture from AMD, to really shake the market up.
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Old 2018-05-14, 00:57   #9
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Quote:
Originally Posted by kladner View Post
I have always wanted AMD to hang in there, at least to keep pressure on Intel. I would love to see a genuine breakthrough architecture from AMD, to really shake the market up.
That's what the Zen architecture is. It doesn't match Intel instructions-per-clock, but it's much cheaper to manufacture. It's why Intel has suddenly introduced 6 (and rumoured 8 core) chips into their mainstream product line. It's why Intel's HEDT chip went from 10 cores to 18, to get ahead of the 16 cores in Threadripper. And Intel still doesn't have an answer to the 32 core Epyc CPUs.

Prime95/mprime is one of the very few workloads where Ryzen isn't competitive. But the price of a quad core Intel has dropped dramatically since Ryzen came out. Zen has shaken up the market indeed.
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Old 2018-05-14, 04:06   #10
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I guess you're right. Perhaps I'm just sour because things started happening right when I abandoned the AMD ship.
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