[Beowulf] FPU performance of Intel CPUs

Mark Hahn hahn at mcmaster.ca
Sun Apr 5 18:28:04 EDT 2009


>>> I'll get an answer: is there any remarkable difference
>>> in FPU performance between Extreme and non-Extreme
>>> Intel CPUs, e.g. QX9650 and Q9650?
>>
>> of course not - the chips are the same inside, so deliver
>> exactly the performance you expect from their operating clock.
>> same cache, same clock, same fsb, so same performance...
>>
>> as far as I can seem the only difference is that the X
>> is an older stepping, has a higher TDP and lower thermal spec.
>>
> And unlocked FSB multipliers.

well, in the HPC world, correctness is normally paramount,
so no form of overclocking is considered much...
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