RadeonPro won't disable crossfire

[Sandcracka]

I've found out that Assassin's Creed 3 SP plays MUCH better with xfire disabled. When enabled, I was getting fps drops down to 10 fps. Disabling it I was getting no lower than the high 30's. I've been using RadeonPro for about a month now. Great software! However it won't disable xfire when setting MVPU mode to: turn off CrossfireX. All Catalyst settings set to default.

Catalyst 12.11 beta11 Cap2
FX 8350
16GB G.Skill Trident X Series
2 x 7870
Crosshair V Formula Z
Samsung 840 Series 500 GB SSD

 

[Yakk]

I have the issue, for games I don't want to use cf, I just disable it in ccc.