Question's in the title. I read about people crossfiring 5970 with 5850 but you can never be sure what's real or not. I've got a 5850 and another coming soon as well as a 5870 on the side. So can a 5850 xfire with a 5870? Can two 5850's xfire with a 5870? I'm trying to sell the 5870 locally but no real good bites so I figure if it'll work, might as well have some fun with it. Oh, and... If it could work, could the pcp&c 910 handle it?