i have a vpor x 5770 and i plan to crossfire with msi hawk 5770, but my PSU is silverstone strider 560W..but its written crossfire certified... some said i can some said i cant! IM STUCKKKKKKKKKKKK.. WOULD you guys help...ty
Yes you can. Your psu has 36a-12v rail=enough. It has the two 6 pin connectors your going to need also.
Once in windows you can use msi afterburner to synch the clocks of the two cards to the same clock speeds, if you want.