So I plan to buy a new camera by the end of the year but I am waiting for NAB. Here are my current PC Specs, what do I need to upgrade to do 4k editing? I would prefer to be able to edit raw 4k even if i have to do half or quarter res.

Motherboard - X99A SLI PLUS(MS-7885)
-Intel Xeon E5-1620 v3 3.50GHz 4-core
-24gb ram
-750watt power supply
-Radeon R9 390 8gb GPU