AMD Threadripper

[Bryan]

Threadripper appears to only be single CPU. Epyc is their Zen dual CPU architecture. It would make Dirk's day if you were to ask him about that

Yeh, I'll have to do that ... then I could join the AMD Users team - NOT

[scole of TSBT]

Do you want to add AMD Epyc 7000 series CPU discussion here or move to a new thread?

AMD's info here...http://www.amd.com/en/products/epyc-7000-series

Here's a wiki page...https://en.wikipedia.org/wiki/Epyc

Hi-lites include...

Single or dual CPU config

16c/32t, 24c/48/t and 32c/64t CPU models

Base freq from 2.0-2.4 Ghz

All core boost from 2.55-2.9Ghz

8 memory channels per CPU

128 PCIe lanes per CPU

[Bryan]

After looking at the cost/CPU I don't think we need a new thread $4700 per CPU (64t/CPU).

[DrPop]

Yeah, anything bigger than "enthusiast" level CPUs with 16C/32T still seems like crazy money...the corporations that buy the bigger stuff must have pretty deep pockets.

I just saw an article that pitted the AMD Threadripper 1950X against Intel's latest i9 7960X (I think it was, whichever one has same core/thread count) anyway, after all was said and done, and they O/Ced both to 4.0GHz, here was the verdict:

Intel CPU 16C/32T is ~30% faster, at same clock speed. However, it cost almost exactly twice as much. So...hard to say what's better if you have the money, I guess. But if price is a factor, that extra 30% is pretty expensive.

[John P. Myers]

Yep. Price/performance Threadripper easily wins. With Threadripper you also get 20 additional PCIe lanes, even if you only got the 8c/16t version.

[zombie67]

Any avx 512 boric apps yet? If/when they start showing up, it will be interesting to get some real world performance comparisons.


Sent from my iPad using Tapatalk Pro

[Bryan]

Rakesearch has an opti app for AVX 512 but I don't think anyone has showed up to use it yet. The Threadripper needs a special opti because it is slow executing some of the AVX2 instructions.

[scole of TSBT]

Memory recommendations for a Threadripper 1950X build?

[Bryan]

64G would be my guess. Then you can run anything your little ole heart desires.

[John P. Myers]

You'll want 3200Mhz (3600 is even better) with the best timings. You'll also want Samsung B-die chips so get G.Skill RAM. You'll also want 4 sticks for max bandwidth and at least 64GB as Bryan said.

Ryzen and Threadripper gain *very* significant performance boosts from good RAM. It's absolutely not something to skimp on anymore. The infinity fabric that allows data transfer between the Threadripper dies is directly tied to the RAM speed. Faster RAM here has the added benefit of increasing the bandwidth of the infinity fabric itself.