PIII 650E overclocking - Temp. problem

[SSeven]

Yes... it's and old cpu but it's all that i have by now...
My CPU is running at ~43șC idle and +63șC loaded, with a PIII 900Mhz standar cooler
If I rise the FSB from 100Mhz to 112Mhz (yes, I'm a chicken) the CPU's temp. easily gets 72șC when loaded...
Since the maximum core temperature is 80șC (that I heard...) I was wondering if the CPU could die if I leave it running at 730Mhz...
If I ain't wrong, PIII Coppermine have a protection against overheating that hangs the system but lets te CPU live... but i'm not sure at all...

Thanks in advance...

Welcome to TechIMO!

Thermal protection is not a failsafe, and I am honestly surprised your P3 chip is even stable at such high thermal loads. They are well built processors, but you are pushing the limits.

By standard cooler I will assume you mean an Intel retail heatsink. The stock Intel P3 cooler is usually a decent heatsink, even for moderate overclocking. Are you using thermal paste, or the thermal interface pad supplied with the heatsink cooler? If you are using the pad, then remove, then apply quality thermal paste (Artic Silver or Ceramic recommended) for improved thermal transfer.

Honestly, it seems like you have a decent overclocking chip, you just need better cooling. Quality heatsink coolers for overclocking the P3 can be found for under $20 these days.

[njakus]

I have a PIII 600 and I overlocked it at 800 Mhz. It is stable.

You can rise your FSB but you should raise your voltage in 0.1°

Try it a few second and if it is not possible, the computer will not start. But it will not kill the CPU

Try

[SSeven]

I'm sorry... it isn't actualy the stock cooler... it's a Power Cooler but i don't know which model.... all that I know is that it is working at ~5000RPM (can't rise), and it works better than the stock cooler (i think it wasn't an Intel cooler)...
I'd buy a better cooler and quality thermal paste, but here in Argentina we don't have exactly a wide variety of hardware related stuff
So I'll see what I can do. THANKS!!

(Now you know why do I have such a bad english, )

[nukes]

Just to mention something. I've had PIIIs at temps above 90c. Sometimes the protection kicks in, but in this case it didn't and I lost the chip. It did run for about 2 weeks at that temp, but I didn't have another fan that would fit it, and I too believed that the PIII protection would save it, as it had in the past. It didn't and now I've got a really good PIII overclocking board, but no slot 1 chips for it.
My advice to you: If your temps are that high at the moment, leave as is, or clock down. Don't assume the thermal protection will save it.

[Telexen]

I setup a lot of LITTLE P3 systems made by Premio at my old high school that ran well over 70c because they didn't have good enough cooling.

They didn't last very long

[SSeven]

After a few hours the temp is 75C
I'll have turn the FSB back to 100Mhz till I get a better cooler.
Once again, THANK YOU ALL!