I bought a Radeon HD 6870 from visiontek as an upgrade from my old MSI R5450-MD1GD3H/LP Radeon HD 5450 And now i can't run any games. With my old Graphics card i could at least run Fallout NV on lower settings but with the new card as soon as i load my game it freezes at a black screen. other games that have the same problem Crysis, X3:TC, GTA:SA, Skyrim. the only games that have worked so far are flash games and when my little brother plays on roblox. Any help would be Great.