I have a NUC5i7RYH running Windows 7 64-bit. The system runs fine with a mini HDMI to HDMI cable on my Dell U2410. I would like to connect the Dell monitor to the mini display port but have been unable to make that work with 2 different mini display port to display port cables. I have changed the BIOS video setting to auto, display port only and display port primary with no luck. With the display port connected the monitor will wake up briefly but I get no video out at all. No BIOS splash or POST. Monitor reports no input signal and just goes back to sleep. I have a second U2410 and would like to run a dual monitor setup.
Problem solved with added hardware. Added a StarTech MTSMDP123DP Mini display port hub in between the NUC and my Dell monitors. Everything worked as soon as it powered up. Don't know if it was the cables or some incompatibility between my monitors and the NUC but the cables are going back to Amazon.