Cel 400 P2B rev1.02

[dead kennedy]

(Lemme preface this by saying it's my first overclock attempt =))

So far I cant seem to break the 500 mhz mark, I boot up with no problems but win2k crashes before it even finishes loading! I've had a look to see if it's any of my other components but they're all fairly new and shouldn't be a problem, the cpu isn't very warm ~22-25 degrees...

Is there any hope of getting some more speed?

[klosters64a]

83 Mhz FSB is a respectable OC. The only way she might go faster is to improve the HSF on the CPU. If it's an SEPP(Slot 1) processor, your choice of excellent HSF's is somewhat limited. Celeron sandwich HSF's tend to be overpriced. Might be hard to find, as well.

If it's a Socket 370 CPU, I suggest lapping it and hanging an Alpha PEP-66 on it. The original Celly's get hot. Fortunately, they withstand heat much better than CII's and PIIIE's.

Now we get to the other side of the equation. I ran a C300@450 on a P2B Rev. 1.03 for about a year. I had to raise the Core Voltage 10% above spec to do this. Core Voltage isn't adjustable on the P2B. The only way to do this is to prevent certain combinations of the VID pins on the bottom of the SEPP or Slocket from contacting their homeys, which are inside the "trench" of the Slot 1 socket.

2.2 Vcc and 2.4 Vcc are the only practical options. As a person of upstanding moral character, I'm sure that you know that more than 2.2 v is NOT done with the original Celerons.

To get 2.2 volts from your P2B, prevent these VID pins from connecting to the Slot 1: A-119 and A-121. As well as B-119. Scotch tape can be used. Teflon tape is much better. Nail polish is also used.

*WARNING* If the insulation on one of the covered pins fails, your CPU is instant toast. You can permanently alter the processor's Core Voltage by cutting the solder traces that lead away from these VID pins, or by removing the pins from the bottom of the Slocket/SEPP. There's no going back to 2.0 Vcc after this is done.

REALITY CHECK. The chance of attaining 600 Mhz Clock Speed/100 Mhz FSB with C400's is fairly slim. You may be better off accepting 83 Mhz FSB/498 Mhz Clock Speed.

[dead kennedy]

OK thanks, its a 370 on a noname slocket with no voltage jumpers :( I think I'll stick it out at 500mhz though as I wouldnt be comfortable messing with the pins just yet:p
I was wondering about the 83mhz fsb though, will that be much of a risk to my video card etc?
I've got a voodoo5 agp and a IBM 7200 14gb that I'd rather not fry, although they seem to be well within normal heat range so far:)