Driver issues in w7 (some games locks up)

Hi

I've recently installed w7, it's stable and easy to use, but a tiny selection of games keeps freezing. these freezes is forcing me to do a hard reset

games like crysis, RA3 works like a charm, but GRID, Endwar, test drive unlimited and ms flight simulator does not work, and all of the games have the same issue.

i know w7 is a beta os and these are one of the bad sides to it, but i just want to cover everything before i do something drastic like reformat and install vista...

hardware:

2 x Geforce 9600gt sli (182 driver)

intel core 2 due 3.2ghz

asus p5n-d

6gb ddr2

audio -> realtek acl 888 HD (i think this one might be the issue)

yup.. turning sli off did the trick... a single 9600gt worked flawless in endwar(high @ 1680x1050) no crashes at all...

thanks :) now i'll just hope nvidia releases some windows 7 beta drivers