More cores or better frequency for vray?

[Darlene_O]

I am getting quotes on a new system with Xeon E5-2600 processors. The salesman told me: "You can upgrade to more cores per CPU (10 or 12), but you will sacrifice frequency" Currently I am getting quotes for Xeon E5-2687W v2 3.4 GHz, 25MB cache, 8.00 QPI Eight-Core with 32 GB DDR3 ram.

Any help would be appreciated regarding the frequency vs. more cores. Thanks!

[vlado]

It might be good to look for benchmarks of the configurations...

Best regards,
Vlado

[3LP]

A good hint is just to multiply the cores per frequency and you will see what the overall GHtz are, it's a ruff idea, but it can still help to make a decision.
And like vlado said, just run through benchmark to see the actual render value of each of the specific cpu.
Just type your cpu model + "Cinebench 11.5" in google and you will find a lot of different threads showing of the render capacity of your future cpus.
I found cinebench the easiest (most documented) and most accurate benchmark tool to compare cpus.

Stan

[Dariusz Makowski (Dadal)]

Like 3LP said. Just multiply cores by frequencey -include turbo boost and you will know what you will get. Single core tasks like loading textures etc etc will be slower but multicore tasks will be faster depending on mghz freq.

[Morbid Angel]

Well there is another thing to consider here: higher frequency per core will yeld faster single threaded operations, which besides the rendering are majority of all applications. So, having less faster cores imo is better then lots of slower ones. The key here is to not have too few cores...that will impede your render speed though.