I think that the only DX11 game demo available is "Dirt 2". Are there demo versions of "Metro 2033", "S.T.A.L.K.E.R.: Call of Pripyat", "Aliens vs. Predator", and "Battlefield: Bad Company 2"? I want to make sure that these games work on my computer with new ATI R5830 video card before buying them. "Dirt 2" game demo works on my computer as well as "Unigine Heaven" demos. I'm not sure about "BattleForge" game and I prefer driving/racing games to FPS games.
Well. the only ones that had demos are dirt 2, Aliens vs predator (not sure if demo had DX11) and BFBC2 had a beta without DX11. the rest im sure dont have demos/betas. also, of course they would work, why wouldn't they? Maybe not 100% maxed out at crazy resolutions but they should run at pretty high settings with a 5830. and dont let a DX version dictate what you play.. most games look about the same d9/10/11 ATM.
dx10 and 11 are over hyped imo and dx9 still is kicking butt when it comes to performance and picture quality.