Issues with R9 270 crossfire

[Lemon Head]

So I recently grabbed a second r9 270 for my system, and set it up in crossfire with my first r9 270.

But I just noticed that alot of games are actually running worse with crossfire on. My first gpu is having ALL of its memory used in crossfire, but when I turn it off, and play the same game, the memory usage goes down to about half, and my FPS goes up by like 15fps in some games.

Im stumped, can I get some help?

System specs.

FX 8320 @4.20ghz w/cooler master hyper 212 plus

8gb single stick of Kingston Fury black DDR3 @1600mhz

1 R9 270 Power color

1 R9 270 XFX Double dissipation

MSI 970A-g43 http://www.newegg.com/Product/Product.aspx?Item=N82E16813130679 link here

650 watt Rosewill ARC bronze semi modular

 

[Altecice]

whats your CPU load like when you play games in Crossfire?