30hz

Radeon HD7850 + 3440x1440 display = black screen after boot, only when on DisplayPort. Personalities wont help... I have Yosemite, booted with multibeast. My current rig is: Radeon 7850 + Dell U3415W (3440 x 1440). When I connect monitor with DisplayPort, bios loading is fine, but I get black...