I recently buought a second Ati Radeon hd5870 to set up a crossfire, but now, my PC totaly freez in some games like Arma 2, League of legend, Battlefield 3. When the freez appear, the only solution is to hard reset the system ...
I use ATI CCC 13.4 with all default settings.
my pc setup :
AMD Phenom II 965 Black ed. 3.40GHz
16Gbytes RAM CORAIR Vengeance
Two Sapphire RADEON HD5870 1GBytes
ASRock 970 Pro3 R2.0 mainboard
Please I really need help !!