I have a M17x R3 with a I7-2670QM that operates at 2.2ghz. I use it for Video Editing and it's starting to show it's age. I have tried upgrading the memory to as much as 20gb with no improvements. Has anyone tried upgrading to a more current processor like the i7-6700K? If so, did it work?

Side note: My desktop is an i5-6400 with 12gb of ram and does a much better job of handling the same program (without a video card). 

Also, is there a list of CPU upgrades that have been successful?