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Good voltage for duo 2?

post #1 of 11
Thread Starter 
I overclocked my 6400 to 3ghz with a fsb of 375, my ddr 800 ram is still not running at stock speeds, but the 1:1 divider makes up for that I believe, whats a good voltage for the cpu? also my ram voltage is at 2.1
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post #2 of 11
I'd personally keep the CPU voltage under 1.5V and the ram under 2.3V. You can go to 2.4V/2.5V if you have active cooling.
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post #3 of 11
At 3ghz i did not need to add any vcore, but after this vcore had to be increased quite stiffly
    
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post #4 of 11
Thread Starter 
Ok thanks, so maybe put it at 1.4? or 1.45?
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post #5 of 11
Thread Starter 
or can I go lower?
Little Smoky
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post #6 of 11
Try it.

We can't tell you.
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2 OP pls nerf
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post #7 of 11
don't overvolt if its not unstable... thats the only thing overvolting is for, is to add stability to a chip. voltage also creates a lot of heat, much more than a higher frequency would, this is why you would want to avoid overvolting at all costs lol.

try to dual prime95 it, it should be stable. if it fails one of the instances within 24hrs then its unstable. also test your memory with memtest86... preferably to 300-500%
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post #8 of 11
Simple piece of advise

If it's not broken, don't fix it. So in this case if it works with stock voltage, don't increase it

However if required try not to go above 1.45v if you can help it, as after this value the thermal level increases at a greater rate due to the impact of this voltage on the processor transistors.
post #9 of 11
Just to echo what everybody else has said... You should only use additional CPU voltage (or any additional voltage) to stabilise an overclock. Any extra voltage is not advisable unless it is required and then you should use as little as you can to attain stability. If you do need to use extra voltage, the current thinking with Core 2 Duo / Extreme seems to be that 1.45v max is OK on air cooling, 1.55v max is OK on decent water cooling and on more exotic cooling, well, I've seen people use up to 1.8v, but I would of thought 1.65v max would be a sensible level, personally.

Imo, the reality is, that Core 2 has not been in use among overclockers long enough to establish hard and fast rules for "safe" long term additional voltages and it will be, imo, a year or more until empirical evidence shines more light on what is and what is not "safe" for long term over-volting.

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post #10 of 11
Thread Starter 
Thanks a bunch for all the info, I went ahead and set it to 1.40 and it seems to be working out great, it was on auto, but you fellow overclockers know, auto and us dont mix also i only raised it by .5 so my temps are the same. Once again thanks to all who took the ime to help me with this.
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Little Smoky
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