Hi,
we are testing Haswell systems with new 28" UHD-resolution Display Samsung U28D590D.
This monitor has DP1.2 and HDMI 1.4a inputs.
As expected, 3840x2160@30Hz works via HDMI on Haswell platforms.
Unfortunately, via DisplayPort, no 4K resolution works with this display.
Via DP, Haswell until now only seems to be able to use Multi-Stream Transport (MST) to display 3840x2160@60Hz.
With Single Stream (SST), only 3840x2160@30Hz seems to be possible.
The Samsung U28D590D seems to expect High Bitrate 2 mode with 5.4 GT/s via DP (HBR2).
According to datasheets, Haswell (4th gen Core i) does support HBR2. But is it really usable?
Driver is 15.33.18.64.3496 on Windows 8.1 x64
Christof