The new 3DMark is only supporting a horizontal resolution of 2560 pixels
From Warp2Search:
3DMark (2013): No Eyefinity Support?
From Warp2Search:
It seems that the new 3DMark is only supporting a horizontal resolution of 2560 pixels, which makes it impossible to use as benchmark for multi monitor setups like AMD Eyefinity or Nvidia Surround.
3DMark (2013): No Eyefinity Support?
