2nd graphics card went out. what's the cause?

[noople]

Hi all,
I was working on a friends computer to fix their display problems. Basically thier graphics card was dead. So i installed another grahics card and it worked fine for about a month and it is now dead again. What should I tell them is the likely cause for this problem. I said at first that they should probably buy a new MOBO or just get a new computer. Their computer is i think '99 or 2000.
Thanks
Greg

[lasher511]

If it was up to me i would get a new computer. however a few things it might be are.
-Its overheating because their is not enough air flow
-The graphics card keeps on getting surges of electricity through it so in this case either a surge in the power lines or the power supply in his computer.
-The mothboard may not support the types of graphics cards that your installing have you tried the same graphics cards on another computer?