Hi there people, im trying to build a gaming computer but i'm a little nervous when looking for parts because i'm afraid not everything will be compatible. I will be playing mostly strategy and RPGs. My budget is around $900 with a copy of windows 7. I will be keeping my old mouse, keyboard, speakers and monitor. My max resolution is 1440 by 900. I wont be overclocking and i plan on running CrossFire somewhere down the line. As of now im planing on ordering the parts within the next 2-3 weeks. If anyone can help me out i would greatly appreciate it. Thanks.