I have a AMD Athlon(tm) II X4 645 Processor, 3100 Mhz, 4 Core(s), and a 700 watt power supply with a ati HD 5670 1g graphics card and a NZXT gaming case and a GA-770t usb3 mobo and windows 7 home premium and also a viewsonic 19 inch monitor and 4gb of memory which I am going to upgrade to 16 gb. what I would like to buy is possibly a ati amd radeon 7850 or a 7870 or a 7950 would like some suggestions on what manufacturer to buy one from and I use this pc mostly for gaming from medium to heavy and the 5670 has really been a great card for the money, after this next card hopefully wont have to buy one again any time soon.