Coupled MP w/ new Dell UP monitor. Had a hard time getting connection right. Needs mDp to mDp and find that if you hold input selection on monitor (8 sec) you can format it to run at Dp1.1 (which is output of stock card) instead of the dp1.2 that is default. Going mdp to HDMI is a no go and have come across lots of complaints on web about intermingling Dell monitors and older Macs. It 's all working now and the monitor is nice.