radeon r9 290x

Hi, I've got a good build running with a Gigabyte Z87X-UD3H, i5 3.6GHz, 16GB Ram with Mavericks 10.9.5. I have two HDDs, one with OS X and the other Windows 7 and dual boot reasonably easily by swapping the boot order. Anyway, I'm doing some 3D work with the DK2 and have a new Gigabyte R9 290X...