New video card not working with my mobo

[wseyller]

I have a Biostar Geforce AM2 motherboard that I've had for a few months. I've been using onboard video since i've had it. I just got a new ati x1650 pro PCIe card.

After I first installed it there seem to be an issue with the computer posting but after one or two tries it powered right up. I installed the driver from the cd and the lastest catalyst update. I tried 3 different full screen games. The pc locked up right away everytime to where I had to restart the pc. I turned it off for a couple hours and booted the pc but the pc just shuts off after a few seconds every time.

I took the card to two other computers and the card works like a champ even while running games. Tried again in my pc and it still powers down right away. I have tried clearing cmos, trying all different video settings in bios, and even updated the bios with no success.

Is there anything else I could try to remedy the problem or is my motherboard just not going to work?

 

[DSF]

Are you sure your power supply is up to the task with the newer card?

 

[wseyller]

500 Watt high quality power supply it what I have. Before I upgrade the mobo it was running some high end agp cards that consumed a lot of power. Those cards needed its own power connector. This new card I got doesn't need extra power besides the PCIe slot.

The computers I tried it in had cheap 350 watt power supplies.

 

[BlueAcolyte]

Overheating problem? Check to see if the heatsink is actually touching the card. Clean off the thermal crap on the card and put some paste on the core.

 

[wseyller]

I don't think it's overheating IMO. It runs on other computers just fine. It ran for an hour playing battlefield 2 on computer at my office. Then on my computer at home it the power shuts off in 3 seconds.

Visually the card looks fine around the heatsink, fan turns on. I'm not convinced just yet that I need to start digging through my closet in boxes to find my heatsink compound.