Between the Radeon HD 5000 series, which card should I buy (I don't mind upgrading my psu) if I'm running a Dell Dimension 9100 with 4GB ram, Intel Pentinum Dual core 2.8 GHz, and a Sony 19" monitor? (I am partially a gamer and enjoy games like Oblivion, Borderlands, Battlefield Bad Company 2, etc.)
More aboutwhich card
whats your screen resolution? but what i'm thinking already is a 5770 since its a very good budget card (139.99-169.99) im getting mine soon, but it requires a 500watt PSU (a good 450 will work) what is your PSU though?
Cant really recommend a card unless i know what power supply your using. I would try to find a 5850 or 5870 and get a Corsair TX750 and call it a day both those cards will play Oblivion just fine at high settings.