Hi, i have a rig of x5 5850, custom case, so all the GPU are realy separated from each other and all with risers....To power is suplied by 2 x CL SP 700w, and the temperature never never go more than 52c. The fact is that i cant overclok the rig more than 850/300 so im onl getting 340mhs wich is realy bad for a 5850.
When i try to go more than 850 it fails. The OS (BAMT) stops responding so i have to reboot manualy the rig. Dont know wich the problem could be.

Im using:
OS: BAMT 0.4b
All the 5850 are Saphire Xtreme.
Driver 11.6.
Miner Phoenix.