celeron 633 - max voltage?

[bobuncle]

I recently purchased a celeron 633 (sl4ny) and managed to oc it to 950 at 2.05V with standard fan/heatsink. It seems to be stable, after running Quake III, etc., and I also ran the CPU stability test overnight (7 hours). However, I wonder how safe it is to be running it at such a high voltage, e.g., I don't see any in the database at this voltage.

[Tim-]

Design maximum is 2.1v so you're definitely pushing it hard. Watch the temps closely! If the temperature is ok I would worry TOO much... Replacement celermines aren't too expensive. Just hope you don't get too many power spikes...

That's a lot of too's isn't it?

[Hima]

Hi,
i have the same celly but never got it to boot with 100mhz, but i hadn´t try to use that high voltage, iwill try.
Using an asus board and the asus probe monitor sotware, it says something about
supported voltage about 2,9v.
That´s alot more like in spec.
Any Idea.

[wild_andy_c]

2.05v is too high indeed. I have never walloped that through a processor to get my 100Mhz - instead I have run at a max of 1.95v and run burning in progs such as seti, 3Dmark looping and prime 95 to clean up the gates in the wafer a bit!!!!

You have to take a much more structured approach rather than just whacking volts in. You have to think about the processor living for more than a few weeks - cos Coppermine 128 and 256's have been proven to die if cooked too much.

I only ever burn in at higher voltages and then drop to 1.85v once I have established a balanced level of speed and stability.

The design max of 2.10v is a threshold only to be hit due to the fluctuations in supply made by your board and the household supply surge factors. Thus a voltage of 1.90v max for air cooling should be observed in order that this upper limit isn't breached

[bobuncle]

Thanks for the warnings/suggestions. By the way, I have a BH6 mobo.

I reduced the voltage and got it down to 1.8V, where it would boot into Windows, but was very unstable. I am currently running at 1.85V and it seems reasonably stable, i.e., I've run Quake3 and the Madonion 3DMark200, as well as the CPU stability test for 40 minutes. I'm planning to the run the stability test again overnight.

I'm not sure why it runs now at 1.85V (it was unstable at 2.0V when I first started). I'm guessing that it is the burn-in factor I've seen mentioned. However, I gather that this is not the recommended way of burning in a CPU :)

[surlyjoe]

I have one running at 2.0 but its watercooled ,,youd better get some decent cooling if you wanna run it that high or your gonna fry it