Hello, not to bust anyones bolts but if you have a core I5 your set. Its not the minimum its more like the medium high but if you overclock it to 4.0ghz then youll be set the minimum for arma 3 is actually the last I3 or 750. The gtx 260 will do you good in it im not so sure about the amd though. My build is a EVGA GTX 670 ftw SC with an I5 3570K OC to 4.0ghz 8gb of ram. If you have all the parts for the system requirments your fine for high settings if you have above great.