Gigabyte Windforce GTX570 OC 13I Rev 2.0

[swiss]

Originally Posted by Whiski

Is it possible that my 570 (type and brand) may use a different driver for the hdmi than my gts 250?

Nope. Gigbyte recomends an older driver on their site though, but this can't be the problem.
if your 250 works drivers are ok. bios is almost ruled out(you would get a black screen plus it's not an onbard card which you can oc/mess w. in the bios)

Maybe it's some crappy OC software, or a lemon card.

I've never seen a OC option in the boot menue.
Wtf is that?