I'm currently running this setup.

Gigabyte GTX 970 G1 Gaming @1567/1880
intel Xeon x5660 @4,2ghz (6 cores 12threads, I actually turn off hyperthreading when playing FFXIV to recieve a boost in FPS. FFXIV likes more cores, but dislikes hyperthreading)
Asus rampage iii motherboard
12gb corsair dominator
Crucial MX100 SSD

Recording with Nvidia shadowplay i get 0 fps loss.
I can play at record even at 4k resolution at 60fps. (FXAA turned off because it's unneeded past 1080)