I accidently bought the normal 3gb one instead of another ghz edition. I've heard this will have some negative effects in crossfire? should I return and get the ghz or will this have no effect on performance?
you probable can overclock the new radeon to match the GE versions settings. Generally there is almost no difference between stock and ge versions except for a more robust heatsink/fan system. just make sure both cards are roughly at the same settings for their clock and memory.