you guys are on mavericks 10.9.2?
i have a sapphire r9 280x, i lost my dual-dvi output with update to 10.9.2
i have 2 x 27" Monitors connected to both mini DP Ports, i get full resolution (2560x1440).
I did a few tests: if i connect just one monitor do miniDP, it has to be connected to the...