im rebuilding a gaming pc that i built a few years back thats became pretty outdated so i gotta upgrade. i want to be able to play Arma 3 and dayz standalone with no issues. i already have a new 500gig Sata hard drive and a full version of windows 8.1. i would like to reuse my old GPU if it can handle it, its a BFG GTX-260. parts i need are a CPU,Motherboard, and Memory. i would like to use a AMD CPU and would like to come in around 300$ for the 3 parts. so my question is will my GPU handle the games or will it need upgraded? and if so which GPU do you suggest. and which CPU,MOBO,Memory do you suggest?