CrossfireX 6950 Problem

[tenble]

So my brother's computer has...

Asrock Z68 Extreme3 Gen3
Intel 2500k [stock speeds]
2x Sapphire 6950 2g
Antec TP-750W

whereas mine has a i5-2500 and single gtx570. When I run benchmarks and test fps in games, the crossfire 6950 run worse than a single gtx570. I have the latest drivers and crossfireX is enabled.

Any thoughts? Thanks.

Also when I check temperatures, they seem pretty low (50-55 degrees). I think they are being underutilised. Any solutions?

 

[esrever]

temp is good, crossfire has issues in some games. Some games will not run well under it but you should still be faster than a single 570. you put the crossfire bridge on the cards right?

 

[tenble]

Yes I placed to crossfire bridge.

When I look at the GPU clocks they seem to run at low speeds always :/