So finally got myself a latest-spec E-Port dock, and a 27" Dell U2718Q 4K LCD to replace one of my dual 24" Dell U2410 (1920x1200) LCDs. Works great. Except the i5-4310M, although it plays back 4K video very well off of YouTube, doesn't have enough "oomph" to do anything else on the computer and basically burns nearly 100% of the CPU during playback. Could I reasonably expect upgrading to an i7-4810MQ to give me a bit more headroom? Also, anyone verifiably have a dual 4K setup going with a Latitude E7470?