TweakTown posted a review on the ATI Radeon HD 5970 2GB in CrossFireX

So, we've looked at the HD 5970 in single form and we've also seen the massive OC potential of the card. You have to wonder what else there is to do? - We'll, that's easy; install our second HD 5970 into the system and see how CrossFireX goes.

Since the second card arrived from big red themselves, there isn't a whole lot to look at. We'll have a quick peek at the card, just in case you haven't had a chance to see what's happening with it. We'll also snag a quick GPU-Z screen shot to make sure CrossFireX is working before we simply get into the benchmarks.

ATI Radeon HD 5970 2GB in CrossFireX Review