Hiv - I only suggested the 2nd BIOS because he's basically eliminated the GPU(s), monitor, cables, as being the source of the problem. It honestly looks like the board is faulty, but its worth a shot if he has tried everything else.
If both cards running at a single state are giving the same problem, then it points to the motherboard. I find it highly unlikely he has two defective cards with the exact same defect.
At that point, trying the second BIOS isn't a terrible idea considering that it is obvious somewhere within the motherboard is causing display issues.
Have you tried running single GPU - in each PCIe slot to see if the problem exists on each slot?
No, I'm thinking your motherboard is defective, NOT your CF cards. As i stated, i find it highly unlikely you have 2 defective cards with the EXACT same defect. You truly do need to test them on a different board somewhere, just as a sanity check, but i highly doubt they are BOTH defective. Again, i believe your board is the root cause if you have tested that thoroughly.
Do you have an older video card that you can try to see if you still have the same issue?
all switches?hmm all the 4 switches of the PCIE are on all the other things are OFF.
the boards has tons of lights on it lol...what a silly question xD
i am using Seasonic 1050W xseries
Borkaman, the only thing you can do is try the 6850's in another motherboard to see if they are showing the same issue, or find someone with an older card to put in your R4E to see if the problem exists on a separate card entirely, thats the only way you are going to get your true answer.