would it, in that case, be best to get a 4870x2 or 2x 4870's ?

Any advantages/disadvantages to either?

So far I found that you can't really disable the 2nd gpu of the 4870x2 for wow (i got told if u have crossfire running ur performance is actually worse than if its disabled).
How is the power usage of 4870x2 vs 2x 4870 ? any Cooling difference?


edit: a bit an offtopic question, but the system mentionned in first post with a 4870x2 in it, got 18 k score in 3dmark06 with that (nothing overclocked). Is this 'normal' ? Reason I'm asking is to find out if its just the artifacts in wow that are flawed on my card, or peformance as well.)