Hi, I have a similar setup, and I have to admit it was VERY challenging to set up. My rig: 6950 unlocked, and just got a 5830 for mining. Before the 5830 I got ~405 MH/s off my 6950, using overdrive only, stock voltage, clocks at 950/1250 and power control at +20.
Reinstalled the drivers for the 5830 now, so I dont have the OC range from the modded overdrive anymore, therefore I use MSI Afterburner atm. 925/350 stock voltage on 6950 and 988/315 stock on 5830. 6950 only gives out 355MH/s now though
, but in total its worth it I think.
In order to get afterburner to give you the OC range, go to the install location, and modify the afterburner.cfg file like so:
Find the line "UnofficialOverclockingEULA" and replace it and the following line with this:
UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 1
Taken directly from my config.
Hope I helped you, I know I could have used this kinda help hahaha. PM me, or post if you need anything, I'm subbing thread.