I have chance to try AMD r9 290 for few days so i run some test i DCS against my GTX960 which i use right now ,it seems like AMD drivers still not work at all in DCS i run benchmark with FRAPS in A10 c introduction training mission here is what i foud (my PC core i5 3570 OC@ 4ghz,8gb ram,SSD) GTX960 min46 avg80 max103 ,AMD r9 290 min28 avg55 max76 as you can see highend r9 290 is much worse than Nvidia mainstream GTX960,so if you want buy new GPU and you mainly play DCS,forget about AMD.