ewalsh16

ok so my problem is that anytime i try to play certain game like mass effect (1) or half life 2, i get a black screen on start up... but while i do have a black screen i can still here sound.
my os is win 7 32bit
my Graphics card's are ati radoen 5770 (x2)
all drivers are up to date
only a few games are effected by this, but most of my games are not effected e.g left 4 dead, battle Field and dragon age all work perfect.

thank you for your time