I have a Intergrated graphics chip and I want to buy a graphics card to run higher quality games than I already have. but I am not sure what graphics card my motherboard can use and I do not want to buy something that will be useless to me. My computer current specs are in the link below.
Make sure your motherboard has PCI-Express x16 connector. http://upload.wikimedia.org/wikipedia/commons/0/0c/PCI_...
Do you prefer Nvidia or AMD?
I would recommend getting AMD Radeon HD 7750 or if you are worried about compatibility issue try getting Nvidia GT 630 DDR3 or GDDR5 version since the Bus connector is still PCI-Express 2.0x16 wwhich will run no problem with older PCI-Express 1.0x16 slot motherboard.
1GB of video memory should be enough for both of the cards i just mention.