I recently purchased a Seiki 4k (4k2k) UHD monitor with native resolution of 3840x2160 and I'm driving it through the HDMI port using a Radeon HD6870/1G. With Catalyst 13.1 drivers, everything works reasonable (although there is a huge amount of lag at 4k resolution when VSYNC in on.)
With Catalyst 13.4 release or 13.6 beta, the computer will not see the monitor as 4k and doesn't support 4k resolution. It only sees the monitor at 1080p. If I revert back to 13.1 fixes this.
Has anyone else seen this problem and is there an easy way to override the default resolution settings in the Catalyst driver?