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Best way to OC for number crunching

Last response: in Overclocking
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March 28, 2011 10:48:42 PM

For the fastest number crunching, is it better to have a higher multiplier or BCLK, or does it matter? I currently have my i7-920 oc'd at 170*21. I recently joined World Community grid, and I am currently donating 24/7 100% of computer time. For grins and giggles I am trying to tweak my system to see what is the most amount of work units I can process in 24 hours, thus the question. System specs in member config. Thanks in advance.

More about : number crunching

a b K Overclocking
March 29, 2011 12:20:42 AM

Raising the BLCK higher also raises the memory higher.
To see what your processor will do .
Change your memory divider down so that memory overclocking is not the problem.

Now Raise the BLCK until the cpu becomes unstable. If you have good cooling you can raise the voltage and check for stability an heat again.
Now drop the cpu multiplyer down . Set the memory divider back up. Now raise the BLCK until memory is unstable.
Now you know your memory and cpu"s top speeds. Try to find BLCK multiplyer and memory dividers that are close or equal to your max speeds in the above testing.
This will equal your best performing overclock.
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a b K Overclocking
March 29, 2011 3:45:34 AM

^Well said Rick
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March 29, 2011 4:36:25 AM

Unolocogringo said:
Raising the BLCK higher also raises the memory higher.
To see what your processor will do .
Change your memory divider down so that memory overclocking is not the problem.

Now Raise the BLCK until the cpu becomes unstable. If you have good cooling you can raise the voltage and check for stability an heat again.
Now drop the cpu multiplyer down . Set the memory divider back up. Now raise the BLCK until memory is unstable.
Now you know your memory and cpu"s top speeds. Try to find BLCK multiplyer and memory dividers that are close or equal to your max speeds in the above testing.
This will equal your best performing overclock.


While I appreciate the detailed reply, I don't see a way of changing the memory divider in my mb BIOS. I have an Asrock X58 Extreme mb bios version P2.80
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