Safety cut-off?

[stevo1210]

Re: Safety cut-off?

Does that mean that my CPU is actually a Coppermine??
I always thought it was a Katmai because it was a slot 1 processor.

[Rainbow]

Re: Safety cut-off?

There are also Slot 1 Coppermines. I have Coppermine Slot 1 P3 550E and it works fine at 733MHz.

[WNG]

Re: Safety cut-off?

Download cpu-z and run it to identify your cpu.

[stevo1210]

Re: Safety cut-off?

I overclocked it again today to 866MHz but this time I used the 1.75V setting instead of 1.65V.

The PC kept on turning off or restarting in Windows XP for no apparent reason.... Then when I can get it to turn on again, the "Your computer has recovered from a serious error" isn't displayed so I'm only guessing that CPU or motherboard hasn't got the problem.

When it turns off it is like the safety cut off I previously mentioned.... I cant turn the PC back on unless I drain all of the power out of it.
I was closely monitoring the CPU temperature.... the last time it shut off, it was at 43 degrees celcius.... I think thats pretty cool to trigger a thermal cut-off.

I don't know whats going on but i'm guessing that my Generic PSU is the problem or maybe this PC isn't good at overclocking.
Anyone got any other ideas to whats happening?



Thanks.

[Rainbow]

Re: Safety cut-off?

Replace that PSU.

[stevo1210]

Re: Safety cut-off?

Replace that PSU.

Thanks Rainbow, At the moment I'm not quite sure if it is actually the PSU causing the problem because I just reset the PC back to stock speed and for some reason it is stable again?? I wonder whats going on inside that PC....

I also changed the memory with a 256MB PC133 module and that hasn't solved anything when I overclock it. Maybe my BIOS is set incorrectly??

Thanks.

[stevo1210]

Re: Safety cut-off?

Download cpu-z and run it to identify your cpu.

I Just ran CPU-Z and it tells me that my CPU is a Pentium III E Coppermine 650MHz.

[WNG]

Re: Safety cut-off?

As a reference, my system is powered by a 165W Powerman PSU. My system has 2 HDDs a DVDROM, ATI Radeon 7200, Soundblaster Live!, Netgear NIC. USB 2.0 port card, floppy, the PSU has no trouble powering it.

If you've set the BIOS as instructed, the HSF has heatsink compound, your BIOS revision is up to date to at least the last official version, then your equipment may not be able to reach 866.
Note: the Asus P3V4X came in two flavors. Check which motherboard rev. you have.
Some have a clock oscillator chip that overheated at 133 MHz.
Do a search for info on this. The fix was gluing a heatsink to it.
Otherwise, your cpu may not like 133. Did you try my 124 MHz suggestion?
If another power supply (borrow one) doesn't help, then it's either motherboard or cpu.

Suggestion: Instead of booting into WinXP and chance corrupting it....download the Memtest 86 bootable floppy and boot into that instead. If the overclock works, the tests should all pass. There are other such floppy/CD bootable tests for cpu load testing that you can also use.

[stevo1210]

Re: Safety cut-off?

Thanks WNG,

My Asus P3V4X is REV 1.02, I reverted it back to stock speeds and it has been running great. My PC hasn't crashed yet in stock speeds.

About the heatsink compound.... I havent applied any new compund to it yet but at 43 degrees celcius?? isn't that still cool??.

Also, how do I get the FSB to 124MHz? I can only select 100 and 133MHz, I'll check it out again soon to make sure if I can switch it to 124MHz.

Thanks.

[kc8adu]

Re: Safety cut-off?

seems your cumine objects to beeing overclocked.
might try 112 fsb first.if no go bump vcore .1v.if still not stable give up.another chip may do better.
and it cant hurt to pull the hsf and clean it up,and apply fresh compound.
remember it takes very little.just there to fill the imperfections in the die and heatsink.

[WNG]

Re: Safety cut-off?

43C is what mine is running at, and I have a rev. 1.02 too.
Within the BIOS, there are combos of fsb/pci clock speeds to choose from besides stock 100/133.

[stevo1210]

Re: Safety cut-off?

I just checked what revision my BIOS was and it is revision 1003. Could my old BIOS be the problem by any chance?

Thanks.

[WNG]

Re: Safety cut-off?

IMO, no. But the last official rev is 1005:

P3V4X BIOS 1005
Change the method for detecting different clock chip.
Change CMOS default year to AC 2000.

As you can see, it targeted the two different clock chips this board used. You might want to flash to it. Be careful if you've never done a BIOS upgrade before.

If your set up can't handle the 133 overclock after all the previous suggestions, then the cpu simply can't do it.

[WNG]

Re: Safety cut-off?

And do understand, overclocking is a risky thing to your system.
If you can't afford the down time or lost sw/hw, I don't recommend you go further.
The unexplained shutdowns point to a flaky psu that can't handle the added load.
Or your loose power connection bent some plugs or cracked a solder joint perhaps.

This thread has everything provided to check for in order to overclock your P3V4X.
Go over it again and make sure you've covered them.