If you are unsure about your PC specs (for example wether you have the GTS or the GTX edition) you may use Speccy (Downloadable from http://www.piriform.com/speccy) to check your system settings. Alternatively you can go Start -> Run -> dxdiag to get a detailed description of your machine and its components. Just so non of you shoot yourself in the foot.
CPU - E6300 C2D 1.86Ghz
RAM - 2Gb ddr2 Generic
GPU - HD4850 Force 3d
HDD - Samsung 500gb
Monitor - Samsung 22" 2243BWX
MB - Foxconn P4M890
PSU - Vantec ion+ 600W
KB(lol trust me you will laugh I rather not mention it) its beige and old
Mouse - Logitech MX518