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Overclock requiring less volts??

bilston

bilston

bilston

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So after running my E0 8400 for ages on what I thought were the volts it required to run at 4ghz, I have since been chipping away at literally every voltage increase in the bios, and noticing no adverse effects.

Ive cut the vCore, vDimm, PLL, termination and NB all down to bare minimums compared to what they were runnning at, and appear to have succeeded in retaining the overclock.

What is happening? Do systems do this over time or did I simply over volt everything in the beginning?
 
its not just that, its every other voltage that Ive downed too. I did update the bios with a custom one which had better tables in it for DRAM overclocking, but that doesnt touch the NB or FSB term side of things. Really strange, not that Im complaining :D
 
It's still as stable as before I assume?

One explanation is that it was overvolted to begin with. Another is that the motherboard is losing it's grip on reality, and is overvolting by more than it used to relative to the bios. I'd go looking for a multimeter at this point.
 
bilston said:
its not just that, its every other voltage that Ive downed too. I did update the bios with a custom one which had better tables in it for DRAM overclocking, but that doesnt touch the NB or FSB term side of things. Really strange, not that Im complaining :D
Click to expand...

P5Q series board with a Mbios by any chance? The Mbios allows clocking with lower volts for some reason.
 
yep, its really nice bios. Thought it only changed the ddr stuff underneath but seems to be amazing all round :)
 
I had a similar 'problem' with my Phenom II to go from 2.8GHz to 3.4GHz on stock volts was fine, added extra volts and it corrupted.

I had to move the clock to 3.5GHz to make it stable with the tinniest amount of extra volts.
 
pastymuncher said:
P5Q series board with a Mbios by any chance? The Mbios allows clocking with lower volts for some reason.
Click to expand...

One possible explanation for a new bios allowing lower voltage settings would be if the new bios overvolts (relative to the setting) by more than the old one did. If it seems too good to be true, get a multimeter out.
 
It's not Asus Jon, it's a guy called Ket over at XS. He takes the stock bios and takes the best bits from other boards bios and tweaks them. Got my old Q9550 to 4.13Ghz prime stable in a P5Q Pro Turbo. Lowered the voltages a tad and better memory timings too.
 
Also bare in mind this memory was needing over 2.2v (Actual) to get the same speed and timings when first purchased. Some times overclocking is just strange like that :)
 
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