Celeron OC - Worked - Doesn't Work

[Hamlet]

I just upgraded my secondary system from p2 to Cel633mhz. Here's the wierd part:

When I first changed mobo, mems and cpu I booted up with my old windows98 installation. It worked fine at 633, 710 and 790mhz.

All fun and games I figured it was time to do a complete win98 reinstall so that I could install all the correct VIA drivers etc.

This worked great to... at 633mhz. If i try ANYTHING above, the computer hangs when I open explorer or "This computer".

Normally I would just accept this and say the cpu can't go any higher than 633. But... Err.. it did. Also, the CPU doesn't get even 1 degree hotter at 790mhz than 633.

Short system info:
Mobo: QDI Legent Advance 10
Chipset: VIA Apollo Pro 133A
CPU: Intel Celeron 633MHz FCPGA
Mem: Original PC100


Please... anyone?

/Hamlet

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Athlon 800@1GHz/MSI 6167/128mb/7200rpm UD66/SB128/G400Max/Win98/Win2k/RH6.2/Be5

[Hamlet]

I might tell that if I use the start-menu to start a game at 790mhz (ie. not explorer.exe) the game or whatever runs perfect for hours.

Uhm...? Please help?

[ayoub_ibrahim]

does your board allow you to manually increase Vcore? if yes, try tweaking the voltage up a little!

[Hamlet]

Hmm, no it doesn't.

But does that really make any diffrence since URT (which I think is very cpu intensive) runs swell?