Cannot get dual cards working...

I don't believe that you can run a third different GPU when you already have 2 running in Crossfire. The 6950 should be about 5 times better by its self than those 2 weakling 4770's in Crossfire.

I dont run them in crossfire mode, they all run individually... I use these machines mainly for BOINC (if you aren't familiar with it, google - it is distributed computing of medical, scientific, mathematical research).
Single cards are a much better option for this as each one runs an individual work unit separately.

I cannot even get ONE 4770 running alongside the 6950 at this stage... I have been told by others that they are currently running different generation cards quite happily, even ati & nVidia cards in the one machine (supposedly - may have to try it).

The 6950 is the main display card and suffices on its own for any gaming I do... just seems wasteful to have the 2 4770's sitting here doing nothing when they are actually VERY productive (seeing they are double precision cards) for BOINC/ calculations etc.

So, the setup is 1 x 6950. then I wish to run another card, a 4770 , seperately, and if overheating can be avoided, another 4770 as well.
There is ample power available.

Thanks for the reply.. hopefully I have cleared up anything I didn't include to abvoid confusion.

Cheers,
Veebee

that 1 6950 would give you the best results.

@ amuffin.. I know the 6950 is the "superior" card of the lot, but the fact is that I wish to run at least one of the 4770's , seperately to the 6950 (ie not crossfire) as each vidoe card does sh*tloads of processing work , which is the main reason I have these machines.

Yes, I do use this computer for gaming a bit, and the 6950 is great, but the extra card is not for ANYthing except running BOINC Work Units...

It doesn't matter that the 6950 is better than the others, I want as many cards running as possible - the more I have running, the more work gets done on research for problems such as Malaria, cancer, clean enrgy solutions, the LHC at CERN, Protein folding research, climate prediction etc etc.

So, I just want to know what I may have missed in setup or whatever, that is stopping this card from being "seen"/ recognised by not only the BOINC program , but by MSI afterburner, CCC , GPUz etc etc ..

Thanks

I worked out what the problem was... so simple and something I had simply forgotten about...
uninstall catalyst/ drivers and re-install.... problem solved !

Thanks all.