Or is there? MP 1.1 + 10.7.5 + Nvidia drivers 295.00.05f03 Went to store to get the gtx 570 but said that they were finished with that. So, did a quick browsing with the phone and was like, yeah, the GTX 660 ought to work! Fail. Is it really so that the older fermi cards like 570 work in MP but the newer 6xx kepler cards don't, no matter what? I should have return rights so I might not be compeletly shafted.. Or am I missing something? - Tried with a helper card, old 7300GT. The screen that is connected to the card gets a picture, but stops loading after 10 secs and it gets the "Please restart computer" in 5 different languages. Restart = Same thing. - Tried in slots 1 & 2. - Seems to work normally in windows under bootcamp. So, any pointers or should I just embrace my fail?