Ryzen 2990WX vs Epyc 75xx / 76xx

[Quartz]

Assuming I have identified the need for a 32 core 64 thread CPU, why would I choose the 2990WX and why would I choose one of the 75xx or 76xx series?

 

[Panos]

Assuming I have identified the need for a 32 core 64 thread CPU, why would I choose the 2990WX and why would I choose one of the 75xx or 76xx series?

You referring to Xeon? These are ancient 8 core CPUs (75xx) while there is no such thing at 76xx except if you are referring to the i5 7600.

 

[Quartz]

You referring to Xeon? These are ancient 8 core CPUs.

No, the AMD Epyc 75xx CPUs.

 

[Panos]

No, the AMD Epyc 75xx CPUs.

oops my fault, didn't saw EPYC.

Look price is one of them. Epyc needs octa channel ram and server motherboard, also EPYC has lower speeds. (Epyc is not compatible with X399 boards).

If none of them is issue get EPYC. If you need a HEDT CPU get TR2.

 

[Quartz]

The 2990WX seems to be ~£500 cheaper than the 7551, for instance, and has a higher clock speed, but I'm wondering if the Epyc CPU has a higher throughput and is therefore faster overall.

 

[smilingcrow]

The 2990WX seems to be ~£500 cheaper than the 7551, for instance, and has a higher clock speed, but I'm wondering if the Epyc CPU has a higher throughput and is therefore faster overall.

It depends on your workload but typically the 2990WX will be faster.
But EPYC does have double the inter die throughput at the same buss speed and double the memory channels which in some cases might well put it ahead.
Those disadvantages can be mitigated to a degree by using faster RAM with TR2; assuming that EPYC has a locked down buss speed. Does it?

 

[pandem0nium]

The existing EPYC CPUs will be based on the zen1 14nm process. So lower clock speeds and no XFR2 goodness. Next gen EPYC will be 7nm, skipping 12nm zen+.

Epyc will have lower latency because all the CCXs can communicate with the system ram vs 2 of the four on the 2990WX.

 

[humbug]

The existing EPYC CPUs will be based on the zen1 14nm process. So lower clock speeds and no XFR2 goodness. Next gen EPYC will be 7nm, skipping 12nm zen+.

Epyc will have lower latency because all the CCXs can communicate with the system ram vs 2 of the four on the 2990WX.

And 64 lovely cores, 128 lovely threads.

 

[Hotwired]

The 2990WX seems to be ~£500 cheaper than the 7551, for instance, and has a higher clock speed, but I'm wondering if the Epyc CPU has a higher throughput and is therefore faster overall.

You'd really have to dig up comparison tests for the exact programs.

 

[pandem0nium]

And 64 lovely cores, 128 lovely threads.

Cores! not words!