I just bought an XFX Nvidia 6200 256MB 8X AGP graphics card.I installed it for first time and worked fine.Since I damaged my driver disk i used an old nvidia driver (v91.3).Everything was fine, but when I started the game "NFS:underground 2" screen went black at the menu screen and the system was rebooted.The monitor failed to power on from then. when I reinstalled win XP and inserted the agp card again the computer just ignores it completely (monitor showing "no signal" even though computer boots) and only uses the onboard graphics. The card does not appear under device manager. It's just as if it's not there. The card hetasink is working, and components are getting hot. There is no option in the BIOS to disable onboard VGA.I have Asrock via P4M266A motherboard with ami bios.There are options for IRQ select,agp aperture size,primary graphics adapter etc. Primary graphics adapter has three options-PCI,Add on agp,onboard agp.I selected add on agp.But all these I have to do with monitor connected to onboard graphics eventhough I have the agp card in the port. My Motherboard supports universal agp port with agp 2.0(4x,2x,1x).Is that the problem? Unfortunately upgrading the motherboard is not an option. The card, motherboard, AGP slot and monitor all works when tested separately/on other computers. Power Supply is Mercury 300W. Anything else I could try? I'm totally stumped on this one.

How did you damage a brand new drivers disc? Regardless, the drivers were probably old anyway. Use this: http://www.nvidia.com/object/winxp_... And why would you reinstall Windows to fix what is most likely a hardware problem or possibly a bad BIOS setting? If you're not getting the POST screen when the monitor is connected to the AGP card, the card isn't working. This has nothing to do with the BIOS or anything else, you *should* be getting the POST screen. If you're not, the card is the problem. To start with, make sure the card is fully seated in the AGP slot & is locked in place, then try again. If you get it to POST, immediately enter the BIOS. The AGP Aperture should be set to 128MB & the Primary Display should be Add-on AGP...do NOT mess with any IRQ settings. If you did, it might be best to reset the BIOS & start from scratch. BTW, which BIOS version are you running? The latest & greatest is v1.90: http://www.asrock.com/mb/overview.a... "There is no option in the BIOS to disable onboard VGA" Yes there is. You have to set "OnChip VGA Frame Buffer Size" to NONE.