Its pretty much a twin card and was wondering if they should work in Crossfire? (I imagine, you only need to match up the Memory, Clock, and chipset to make it work in Crossfire with no degradation of full Crossfire performance)
Also, I know there are 6970 shader unlock mods for certain 6950 cards. I already tried it on my Gigabyte 6950 card and it worked, so was wondering if it will be fine crossfiring two shader unlocked 6950 cards.
You can CF both of them. Which ever card is lower the higher card will drop to those settings. How ever it is aways a good idea to use exacted cards and according to AMD they don't recomend doing it.
But you can in fact on AMD cards a rule of thumb is the first two numbers have to be the same for example 6850 will CF with a 6870 and 6950 will CF with 6950 but you 6970 will now run as 6950.
Good luck to you