Quote: Originally Posted by cmd187
Disable any onboard GPU and ensure that you set PEG in your BIOS for the first card that boots up.
If you aren't using the integrated GPU (normally) it should be set to this anyway.
If setting the card to PEG (or equivalent setting in your BIOS) makes the 5870 visible again, uninstall the integrated drivers as well. Hopefully it would avoid future conflicts.
Quote: Originally Posted by clockworkbass
But the thing that's really getting me is my radeon doesn't even appear in my device manager anymore.
If the above fails, boot on the integrated, uninstall the ATI drivers,shut down.
Physically remove the card and re-seat it. If it's redetected uopn boot, install the drivers.