lockups , reboots and sometimes problems with booting up

[RAM1]

I am having problems with my computer locking up and at times it reboots by it self.. Also at times when I turn my computer on or durning one of its auto reboots it hangs up on tring to recognize the ide drives.. I have swapped memory , hard drive and VC. from my other computer and same thing happens.. I also just flashed the bios and still nothing.. I don't think its a heat problem , cause it does it mainly does this when I first turn on the computer .. I do not overclock or have tweaked anything else.. I have also reforamtted more then once, so I do not think its my OS.. Any suggestions would help..

System specs..

900 duron
pcchips MB ( M805LR )
Radeon 8500
512 corsair pc133
WD 20 gig HD ( Also tried my IBM HD )
built in network card
netgear pci network card
windows 2000

 

[DaiShan]

what power supply and how many watts? has this computer always had this problem or is it just starting now? is the fan on the PSU spinning? can you try another 300watt amd approved psu in the machine?

 

[JerDevil]

I'm having the same problems

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I'm having some problems with my computer auto-rebooting while I'm working.

Here is the scenario (Main Problem):
In OutLook Express viewing some mail... I hear a faint hum and the computer reboots. Sometimes it will fully reboot, and other times I have to turn off the computer after it tries to reboot, hit the power switch and then hit the reset button. If I don't hit the reset button, the monitor will not give me a green light and the hard drives don't seem to run either.

So, It's really not a computer FREEZE-UP, but rather the whole computer cutting off on a random schedule.

Recently... I can only have OutLook Express open for 15 seconds before OutLook Express Crashes. I have to say, I have much MBs of email stored up, but I don't think that is the problem. I successfully backed up all the Outlook Express dbx files, so a reinstall is possible.

Could the problem be:
processor temp? (ave temp= 100F - 122F)
DDR memory?
bios?
software corruption?
power flux in the power supply?
USB?

I'm lost for a solution. Has anyone else experienced this same type of behavior?

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Specs
(ave cpu temp= 100F - 122F)
(ave case temp= 95F - 108F Lian-Li Alum)

XP PRO OS
AMD Athlon XP 1800+/266 FSB (retail)
MSI K7T266 PRO2
Radeon 7500 64 DDR
ENERMAX EG365P-VE( FC ) - Power Supply
2 x 256 Cruical DDR 2100
2 x 40GB IBM 7200 DeskStar Hard Drives

 

[DaiShan]

jerdevil: have you tried the latest via 4 in 1's? do you have another power supply that you could test with? can you try with just one stick of RAM then another trying to duplicate the problem? does this only happen with outlook? how do you connect to the internet with this machine? are you using any usb devices?