well thats a stretch. To game on 3 1080p monitors I would say to have a minimum of a gtx 970 whihc is itself 300. If you were to get a 970 you would want a 500w+ psu that you should be buying from a good reputable brand and should cost a least $45-50. So unless you were to buy a 970 used somewhere for around 260 its not possible. I mean you could get a 960 4gb and do it but you would have to play games on low settings and maybe get 30fps.