has anyone seen this problem?

[ahurtt]

In a nutshell, the problem is my machine randomly rebooting.
Read on if you want the details or think you might be able to offer some advice.

Ok, a few days ago I posted about my computer coming on (fans come on, lights come on) but then nothing happens. No beep, monitor blank. I'm running a PIII 933 at 133Mhz fsb with 256 Meg PC 133 SDRAM. No overclocking involved. I had found that if I pop out the cpu and replace it with my old PII 400 cpu then turn on the machine, it would boot. I could then immediately turn off the machine, pop back in the PIII 933 cpu and it would boot up ok again. Except now I am experiencing random reboots. I'll be in the middle of doing something simple as reading my email and the system will just reboot. I now have replaced the PIII 933 with the PII 400 and clocked down the bus to the appropriate 100 MHz and so far it seems to be ok and no more reboots. My question is has anybody else had problems with their system randomly rebooting and if so and you were able to resolve it, what did you find the problem to be. I'm fearing it is my CPU in this case but I don't know if it might be the motherboard or the memory flaking out at the higher fsb speed of 133 MHz although they are rated to support that speed. Just want to get other peoples opinions and exhaust all possibilities before I go out and blow my cash for a new CPU and find out that's not the problem.

Thanks in advance to all who read this.

[ahurtt]

BTW here is a link to my previous post:

http://www.sysopt.com/forum/showthread.php?s=&threadid=97581

[ahurtt]

I just realized in my previous post I listed my motherboard as an Abit BH6. That is a mistake. It is an Abit SH6.

[Bovon]

This is a guess, and hopefully someone else will come along with more, or better help. I have read about under powered power supplies causing spontainius reboots. Low power levels take a few minutes sometimes to trigger a reboot aparently.

Some systems will reboot if the cpu temp exceeds a certain temp. Any chance you have a hot case and cpu?...the higher speed cpu's generate more heat than the older ones do...especially in the AMD series, and I am not familiar with INtel.

Temp related problems can usually be determined by removing the case cover and using a table top type of house fan, blow ambient air directly into the 'guts' of the case around the cpu.

[ahurtt]

hehe, that's exactly what i've done, the computer is sitting with the side wide open and a oscillating fan about 3 feet away blowing on it. So I'm pretty sure its not a heat problem. Right now I have replaced my 256 meg pc133 ram module back in but clocked it down to 100 MHz to work with the PII 400 CPU. I got a windows protection error on the first boot up and had to push the reset but so far except for that it hasn't happened again.

Next I will try putting back in the PIII 933 cpu but keeping the fsb clocked down at 100MHz instead of 133 and see what happens then.