What have you got now? My 290 Pro runs 2560x1440 at a steady 60fps, I reckon it would be playable at 4k as well.
I have an NVidia GeForce GTX 600. My PC was put together ±8 months ago by Scan Computers (UK) i.t.o. a spec from my son who is in the games industry. I wasn't expecting to need sophisticated graphics at the time so I imagine it's a fairly unexciting card, but there's loads of room in the case. I called Scan a couple of weeks ago about all this and they said no way will my card run 4k, and recoomended dual cards (can't remember what they were) if I want to go 4k.
From other comments made here, it looks like I should either go 2k and be satisfied, or wait for 8k and really treat myself.
Many thanks for everyone's replies, they are really useul!
