High cpu temperature on start

[nev4]

I have mobo A7V333: as i put duron 1400Mhz on it - mobo shows that cpu temperature is 55C (max 10sec after turn on) and it continues getting higher rapidly to ~75C and mobo shuts down (even if i set it to 1050Mhz).
As i put duron 650Mhz and turbo it a little starting heat is ~20 on starting and it gets to ~35C after some work, it should get hotter after more time.

what the problem is here? i'm sure cooler is suitable for duron1.4, maybe temperature pasta is leaking - could it be (not much left on it)?

on older mobo k7vza it's temperature was normal as i remember...

bios 1014 if i have seen it right

[edwin]

put the duron 650 in it and update the bios to the latest version first. Then make sure that cooler is indeed suitable for the 1400 and mount it properly. Although Asus early bios revisions have a habit of showing waaaay to high temps, the windows crashing sounds like it's actually overheating.

[nev4]

flashed bios and put cooler 180 degrees - that was the problem.

[edwin]

don't feel ashamed. that sounds familiar. if you build enough systems eventually you'll make this mistake...