Sytem boots up fine but locks up after 5 minutes and will not restart for a couple of hours. The cpu and case fans all work. I have a front mounted CPU temp gage that shows the cpu holding stable at 50-52c. The motherboard and cpu are less than a week old. The power supply is 350 watts so I'm sure there is enough power. Any ideas, I dont want to send the motherboard or cpu back untill I know for sure what the problem is. Here are the specs. AMD 2600+ (333FSB) Chaintech 7njs MB 512 MB PC2700 DDR 350watt PS GeForce3 TI 200 video Any help would be appreciated.

Try tufftest. My guess is its the mobo. http://download.com.com/3000-2086-8596189.html?tag=lst-0-1

Had the same prob with an old DX4/100. It was the PSU; it had so much dust in it it was like soil, and would do the freeze / not start bit. Get some screwdrivers, take to lid off the PSU (UNPLUGGED!!!) and have a look. If you can grow tomatoes in there, give it a clean with a dry brush of some sort.

Be carefull with that power supply if you decide to open it. Even unplugged, it still holds power and could harm you severely.

First of all, it is not a good idea to open up the PSU. It may difficult to determine a power supply problem vs Mainboard when you can boot up. You could try unplugging other hardware power connections such as CDROM, CDRW, etc, and see if this gives you more time before the freeze. Make sure you also vacuum out any dust visible on the vents of the power supply. It sounds more like a heat issue due to the fact there is a "time" issue before you can reboot. Also, check the CPU fan to make sure it is blowing in the right direction(towards the heatsink) Overheating video card and Memory can also cause lockups so check to make sure airflow isnt obstructed, or remove the case cover and run a fan pointed to the inside to see if the lockups still occur.Post Back. Good Luck.

52c is too hot to run your CPU, that is 125 degrees f. CPUs should not run above 115, period. Get a new heatsink/fan combo, a new case fan, or both. Make sure that the bios settings are correct for the CPU also.

Acording to AMD the max temp for my CPU is 85c. The system ran stable for a week holding at 50-52c using there heatsink and fan so I do not believe this is the problem. I'm going to try unpluging devices I dont need to see if runs stable.