Hello,
i have a gateway running vista and tried to replace the graphics card, now it wont boot and when i put the other one that was in it back it still wwwont boot. wht can i do?
Do the require power leads from the PSU? If so, verify that the are properly connected to the card. New GPU cards usually require one or two 6/8-pin power leads.
If you were using the integrated graphics when your GPU was not there. Then put the GPU back in. Remove the RAM and then put it back. Check if it works.