A friend of mine has a few extra 5K ultra fine displays and asked if I wanted one. I took him up on the offer and have a few questions. Currently my MBP is docked with a Dell Ultrasharp U2717D 1440p monitor and thats worked well for a number of years now. my question is can I use the 5k and dell together. On Apples site it says that I can either use two displays at up to 4k or one 5k but isn't clear if I can use one 5k and one less than 4k ie 1440p Monitor together. Its not the end of the world if I cant use them both as ive lived just fine off one display all this time. my other question is my setup right now is MBP->TS3 dock-> Dell Ultra Sharp. can I just connect the 5k to the other thunderbolt port on the dock to keep my single cable solution or is the 5k and the Thunderbolt dock too much for a single thunderbolt 3 port on the Mac?