I gave up windows, seems to be either an absurd driver problem, my cpu is fubar, my mb is fubar. Neither HD 4000 nor 650 ti works. Separately or together. Tried 2 win7 versions and 1 win 8. All crash at login at either garbled screen or black screen with frequent hard auto resets. But ML works flawlessly except the fans not spinning higher on the 650 ti! Tried also all 3 mb bioses available. 650 is also changing frequencies under load as it should..
oh well its a grand mystery....that i suspect has smth to do with the cpu, ram and mb. Ill settle with mac os until new mb bios, hd4000 and nvidia drivers turn up.
But anyway, could there be a gpu fan setting has smth todo with the agpm kexts, or smth else? is that completely ruled out?