Next logical upgrade piece (higest preformance gain)?

Saint Crake

Honorable
Dec 10, 2013
40
0
10,530
Looking to upgrade another component in my PC but can't really seem to decide what to upgrade and if I do think think of something it leads to almost half a rebuild, my specs are below. Just looking for what part I could upgrade to gain the highest performance. Not overly concerned about price. Thanks.

Case: Phantom 530
Mother Board: Gigabyte x79 UP-4
Power Supply: Thermaltake Smart Series 1200
Processor: Intel i7 4820K (4.1GHz, LGA 2011, Kraken X60 AIO)
Ram: 16GB Kingston Hyper X beast (1866MHZ)
Graphics Card: Gigabyte GTX 780 Windforce GHz edition.
Storage: Crucial M500 SSD (480Gb), 1 TB WD (can't remember model)
Monitors: BenQ 2420TE, Asus VG 248QE (1ms, 144MHz)
Cooling: Cougar HDB Fans.
 
The biggest two performance gains to be had by your machine are another GTX 780 (SLI) to get more FPS from your 144Hz display, [strike]and/or an SSD to get rid of your longer load times in games/make Windows more "snappier"[/strike]

The rest looks pimp.

Just saw you have an SSD.... SLI or Mult- monitor setup with SLI