Is it possible to adjust CPU freq/voltage depending on CPU load?

[Artheas]

I've got my Opteron running at 240 x 9 at the moment, which goes up to approx 290 x 9 at 1.45V. CPU temp under load then goes up to around 50 at 290MHz, not sure what it is at idle, but it's higher than idle temps at 240MHz of course.

I want to have the higher frequency (therefore higher volts) when i'm doing stuff that might actually need it, but not to have the higher volts running through the CPU because i want it to last as long as possible.

Is there any software which can do what i want? Or is that something only a non-existant BIOS mod could do?

 

[Artheas]

I'd considered cool n quiet but i'd heard it's not recommended for use with overclocking, so i avoided it. My worry with it is that the voltage goes down along with the multiplier, but the lower voltage cant sustain the unaltered FSB/HTT.

RMClock looks like what i want, it seems to be unstable, but i'll try it out on Sun/Mon.

Those temps were for my old an8-sli mobo, with an arctic freezer pro 64. idle temps at 200MHz were at 20-23, so if 1.45V, 290MHz under load at 50 degrees is high, it must be something to do with my CPU.