Oh my God. It feels like even having long conversations with both Apple and Dell that I cannot get an answer to my question so let me try and figure this out.
I have a 15" Macbook Pro Retina mid-2014. It has an HDMI port and 2 Thunderbolt2 ports. I'm going to be buying the Dell UP2715k 5k monitor. It's video ports are as follows (http://icdn5.digitaltrends.com/image/dell-up2715k-monitor-jacks-1500x1000.jpg): 1 Mini Display Port, 2 Display Ports.
I am wanting to connect them both together so on the 5k monitor it would downsample to show my retina resolution. I hope that makes sense.
I chatted with Dell and they suggested a Thunderbolt (or Mini Display Port) to Display Port which would allow for both audio/video and display as retina on the 5k. They also said I could use HDMI to Display Port too.
Apple had no clue. Typical.
What are people's thoughts? I know you can do it with one cable now (based on reading!) but I have no idea if Apple/Dell are correct?
Also. I know 'retina' is just a marketing term but thought I may as well use it as it's driving me insane.
I bought the Dell UP2715k 5k monitor and connecting it to my MBP via two miniDP to DP cables. All generally works okay but I get this odd split screen thing which stops the cursor from being as responsive and accurate. Any thoughts? Videos below of issue.