Calibrating Speedfan. Can't lower CPU voltage.

It isn't a good idea to use software to change voltages. Go into your bios and do it manually. If that doesn't work post back here.

Thanks for your replies and sorry for my late reply. I'm preparing to move and can only post late at night.

I wasn't very clear so I'll try again. Both Speedfan and Real Temp require lowering the cpu voltage and frequency. With my BIOS, I can raise the cpu voltage but I can't lower it. It really bites not being able to lower the voltage for the reasons Zorg stated.

With my stock VID of 1.325 and my CPU @ 3.0GHz my vdrop (idle) is 1.296-1.312 and vdroop (loaded Prime95 short fft's) is 1.264-1.272. I imagine it's not much of a difference if I lower the FSB.

My temps are decent, I was just wondering how much if any not being able to lower the CPU vcore would matter. I was also trying to figure out which temperature app. was most accurate. I haven't changed Real Temps Tjmax which is at 95. My best estimate is that a calibrated Real Temp is better for my idle temps and a calibrated Speedfan is better at load temps. Core Temp (with factory settings) is kinda in the middle with 2 warmer cores. I have lapped my CPU and my Xiggy S1283 has dual Antec Tri-Cools set on med. (1600 rpms). My case is also full of Tri-cools and one Zalman ZM-F3 in the blowhole position where my push-pull Xiggy aims. Any thoughts of which if any are accurate?

Q6600 @ 3.0GHz loaded with Prime95 short FFT's all fans on med. Ambient 22-23C.
Core Temp 55,55,47,49
Speedfan 51,51,50,50 *Tcase=45 - 46
Real Temp 50,50,46,44

Q6600 @ 3.0GHz idle all fans on med. and ambient 22-23C.
Core Temp 35,34,27,33
Speedfan 32,33,30,34 Tcase=26
Real Temp 29,29,29,29

Zorg, Your right. It's not something I need to loose sleep over. I'm more curious about it than anything. I've tried many things to lower my temps according to Core Temp (extra fans, lapping, going from a Xiggy SD964 to a S1283) and I've not seen but a 1 or 2 degree difference. Calibrating my other 2 apps lowered my temps more than anything LOL. I just want to know if it was worth it and/or semi-accurate.

Thanks randomizer.

AFAIK, my BIOS doesn't have C1E . I do have EIST but it only lowers the multi right?

I did try EIST when trying to calibrate, but I didn't see a change after idling for about 5 mins. Maybe my HIPS and/or AV kept it from working? I'll have to try it again after I move and settle in.