Remove your card and reseat it.
If that doesn't help, check the power connector.
It could be that the slot is bad.
What mobo is it? Have you installed the chipset drivers? Possibly could need new BIOS, but I doubt it as the 6800's are older cards.
If that doesn't help, check the power connector.
It could be that the slot is bad.
What mobo is it? Have you installed the chipset drivers? Possibly could need new BIOS, but I doubt it as the 6800's are older cards.