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perfwise
Beginner
57 Views

Clk speed of UNCORE in NH and SB

Hi,
I was measuring the L3 latency between NH and SB. The L3+Uncore ran at 2x the memory frequency I believe in NH, but in SB the L3 runs at core clock frequency. Does the rest of the UNCORE, the memory controller and coherency traffic controller also run at core frequency in SB? Thanks for any help..

Perfwise
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4 Replies
Patrick_F_Intel1
Employee
57 Views

Hello Perfwise,
I'm researching this topic. Get back to you soon.
Pat
Patrick_F_Intel1
Employee
57 Views

Hello Perfwise,
These various frequencies in the uncores haven't been disclosed.
Is there a particular problem that you are trying to solve that this info would help you solve?
Pat
perfwise
Beginner
57 Views

Pat,
I was measuring the L3 and memory latency and using that in my PMC studies. I had remembered SB ran the UNCORE at 2x the memory frequency, but knew that it could be run at core frequency as well (if you have a good bios which let's you do that :). It got me wondering what the behavior was on SB, and that's why I asked that question.
So doesn't sound like that's something that is going to be documented, right? Thanks for the help anyways..
perfwise
Patrick_F_Intel1
Employee
57 Views

Hello perfwise,
Yes, it is not going to be documented.
Pat
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