AC3 multiplayer crossfire issue

[Sandcracka]

I'm currently running 2 7870's in crossfire. I can play single player no problem. But when I try to run multiplayer, my pc crashes nearly 95 percent of the time. If I disable crossfire I can play multiplayer without any issues. I'm currently running CCC 12.11 beta11 with Cap2. Is anybody else having the same issue?

Edit

System specs:

FX8350
Crosshair V Formula-Z mb
Gigabyte 7870 OC edition Crossfire
G.SKILL Trident X Series 16GB (2 x 8GB) 1866
SAMSUNG 840 Series MZ-7TD500BW 500GB
Antec High Current Gamer Series HCG-900 900W

[spectatorx]

Do you use some kind of aa injectors for this game?

[Sandcracka]

Do you use some kind of aa injectors for this game?

No but I do have Radeon Pro installed on my pc. I don't have AC3 loaded into a profile in that program tho. Is it possible that Radeon Pro is using a Global setting for all games? Even the ones that are not loaded into profiles? *I'm new to Radeon Pro so I don't know too much about that program yet.