A friend encountered an odd problem the other day. He has a RadeonHD 4850 X2 with three monitors hooked up. One via HDMI and two via the DVI ports (the monitors are actually just DSUB so he's using DSUB > VGA converters).
Anyway, Windows (7, 64bit) works fine with two of the monitors (the one HDMI and one DVI) but if he tries to enable a third, CCC tells him that he needs to choose one to disable. As far as I'm aware, the 4850 X2 is able to power 4 screens so why is it insisting on only allowing two?
I've spent some time looking this up and the only other incident I can find relating to this is back on the old version 9 drivers where people said you needed to disable Crossfire to get 4 monitors, but you can't disable Crossfire with the later drivers now so that's obviously not an option. It doesn't really make any sense either.
Any light that anyone can shed on this would be appreciated.