i m having a nvidia 8600 gt 512 mb graphic card (xp sp2) ....it was running perfectly
before .........but after i opened my cpu's cabinet to blow off all d
dust (i did wid a soft brush) n after closing dat i also tried to
connect my t.v wid gfx ...through d other port given in it
...............after dat when i started my pc ...... its giving me
checked colored line where ever dere is video involved (have a look in
photos which i have uploaded) 1.( http://www.techsupportforum.com/attachments/video-card-support/42350d1232996171-nvidia-8600gt-having-some-problem-driver-untitled2.jpg )
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If I were you I'd try to insert another geaphics card in the mobo, if it does detect that one the graphics card is broken, if it doesn't try updating bios.
If that doesn't help either, the mobo has failed.
You can try to contact the manufacturer of the broken art, see if they have any tips, but I guess broken is broken.
HEY BUDDY JUST USE YOUR PREVIOUS DRIVERS.I ALSO HAVE THE SAME PROBLEM WITH MY NVIDIA GEFORCE FX 5500 256MB.UPGRADE UR WINDOWS XP TO SERVICE PACK 3 AND THAN INSTALL THE DRIVER THAT WILL SOLVE THE PROBLEM>ALSO DONT FORGET TO RATE ME.
Roll back the drivers to the original that worked and leave it there. Some times an update acts more like a downdate and screws things up. If your getting blue screens, its a hardware failure and is most likely do to the drivers just not being compatible with your system config.
You could also try updating the BIOS on the mainboard and see if that improves it.
I had alot of issues with ATI's catalyst on my last computer. the program kept causing problems so i removed catalyst and installed just the drivers and it worked great after that.
One question, why do you want to change the voltage of the PCI express, have you by any chance overclocked your machine? If not the default values should do fine since the 8600GT is not a power hog.
If you have overclocked then the recommendation is that you try to see if you set the PCI frequency to 100 (default) so that the PCI-e bus does not get overclocked, as its known that some devices fail when the bus is increased (such as the SATA hard disks, etc).
You will also not have to change the voltage of the PCI-E bus unless you have aggressively overclocked your machine.