I need help! I recently completely upgraded my computer and now I'm having problems. My Athlon XP 2400+ has a normal voltage of 1.65v and this if fine when I load the BIOS and watch the temps - cpu never above 43c and system never above 33c. However, I cannot boot windows XP with this voltage. The boot process will just crash. So I have my voltage at 1.75v and with this change Windows XP will boot and run fine. However, My cpu temp will be about 57c idle and my case will be reach 39/40c before my system will crash. What could the problem be? I have tried everything from changing my video card from a PCI one to an AGP one (same card - Geforce 4 MX440) and this decreased the system temp to about 37c, but it still crashes. I tried adding case fans, didn't help. I tried organizing my case (so that I have maximum air flow) and still it will crash. I've thought that I might need to get a better cpu cooler, case, or video card. If this is the case can you recommend which cooler to get? But my main question is this - Why won't Windows XP boot with 1.65v and if I have to have my system at 1.75v then how can I prevent my cpu and system from getting so hot? Thanks for any help guys. My full cpu config is below (I haven't updated my video card to an AGP yet, I know. I will when I have the cash. The PCI is from my old Celeron setup): MSI 745 Ultra M/B with BIOS 1.6 Athlon XP 2400+ Thouroughbred 266FSB Corsair 256mb PC-2700 DDR Ram Geforce 4 MX440 PCI Video Card Soundblaster Live! 5.1 Sound Card Best Data 56k Modem 52/48/52 CD-RW 40.0gb 7200RPM Western Digital Hard Drive 450w Powmax 8800D Power supply 1 80mm fan on back sucking out 1 80mm fan on front blowing in 1 Hard drive cooling fan 1 CPU HSF rated up to 2.4ghz

I forgot to add that Windows will crash after about 10 minutes when using 1.75v with the temps I listed. It usually happens in games (3D especially) which is why I initially suspected my video card, but switching to AGP didn't help.

The psu gives 12v to the mobo and the mobo turns that into 1.65v for the cpu and if either the psu or mobo does not produce a stable voltage the cpu can freeze. I'd try a different psu.

Well, I tried a different psu (300 Watt JEG I think) and it seemed to keep my idle cpu temp at about 48c at 1.75v but I still think this is a little high. I suspect it may be because the psu wasn't powerful enough and I'd like to be sure the problem lies with the psu before I buy another one. Also, I don't know if this will give you guys some more info but my voltage is as follows (monitored with MBM5): vcore - varies between 1.68 and 1.76 +3.3 - 3.31-3.33 +5.00 - 4.80-4.84 +12.00 - 12.52 -12.00 - -13.51 -5.00 - -5.69 Also, I've noticed a new problem that may have been there already, but I just noticed it. Sometimes my programs will just crash by themselves. No error messages or anything, it will just crash to the desktop. And this is when I have a desk fan blowing on my components (cpu 43c and case 32c). Could this be related, or just a windows problem? Thanks for any help!