r higher (see supported list)SUPPORTED VIDEO CARDSATI Radeon HD 2900 / 3000 / 4000 / 5000 / 6000 / 7000 seriesNvidia GeForce GTX 8800 / GTX 9000 / GT 200 / GT 400 / GT 500 / GT 600 series=================================Notice not a single mention of OS, however Game-Debate, Gameinfocenter, Systemrequirementslab, as well as Steam, Gamestop, Amazon and other retailers shows Min Reqs as XP.MY BEST A