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Quick Question - Underclocking CPU

Soldato
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22 Oct 2005
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Hi Guys.

I have a program and I want to see how the performance changes depending on the power of the cpu. I dont have lots of different cpu's so I was thinking of just underclocking my cpu to 1GHz and then 2GHz and seeing the comparison with 3GHz. I know this isnt ideal but i'm not made of money lol.

My question is can I just reduce the speed in the BIOS and away I go, or do I have to change RAM speeds/multipliers/voltages etc as well? I dont want things to go bang you see...:p

Thanks for any help.
 
It depends if you are changing the muliplier or the bus speed as changing either is the sum of the CPU speed.

If you are changing the bus speed then the memory should automatically work at the correct settings providing the DRAM is set to auto.
 
Was just going to change bus speed if possible. Its currently on 350x8. Was just going to lower the bus to 125 and 250 to give 1Ghz and 2GHz, leaving the multiplier at 8. Would this be ok?

I cant remember what the DRAM is set to but before changing it I will set it to Auto. Or would it just be easier to change the multipler to 3 and 6?

Thanks again.
 
I think your are best off setting the bus speed to say 200MHz and set the multiplier at 5

1GHz

In which case you will need to set your RAM at 400MHz for syncronous memory speeds.

Bear in mind though, that the system may attempt to run the RAM asyncronously.

Like overclocking, i don't think you will do any harm just make sure you have access to the CMOS reset jumper :)
 
I think for a better comparison you are better only changing the multiplier as the FSB speed also affects performance.

Each CPU from a matching product line up will have the same FSB only the multiplier changes.
 
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