Not sure how crossfire is now, but about 4 months ago I tried crossfiring with two exact xfx 7870 black editions and was nothing but a week of headaches and only got it to work on one game for a little bit. Game it worked on was bf4, all other new games nothing. Then within half hour on bf4 screen started glitching and tearing. So went back to just one and worked fine. I have since then sold one 7870 trying to sell other still, but have upgraded to a evga gtx 770 sc dual and love it.