Check out some Counter Strike Global Offensive gameplay at 4K maximum settings on a pair of Nvidia GTX 1080’s in SLI
Full system specs
Intel i7 5960X overclocked to
MSI Gaming 7 X99A
Nvidia GTX 1080 EVGA Founders Edition
Nvidia GTX 1080 ASUS Founders Edition
EVGA High Bandwidth Bridge
AMD R9 290 MSI Reference
Driver
Nvidia GeForce WHQL driver
32GB of Corsair Vengeance LPX 2666Mhz DDR4
Corsair Graphite 780T Black
Corsair HX 1000i PSU
Corsair H110i
Samsung 850