I've encountered several problems with with my new Acer 5740g (1.22 BIOS) and I'm afraid these are connected with Mobility 5650 or its drivers. I run Win 7 HB x64 (DirectX June). Civilization V in dx11 crashes just after 'Firaxis Games' intro sequence (dx9 .exe doesn't work either). The same thing happens to Dirt 2 (also dx11) - game crashes just after developer's and publisher's intros. Different thing happens to Metro 2033. Running it in dx11 in 1366x768 causes the game to display black vertical stripes running all over the screen (stripes each two millimeter wide and two mm space between them, so they look like narrow bars), although game graphics is generated (displayed) 'under' those black stripes. What's more bizzare, the game runs fine in 1360x768 in dx11. In dx9 and 10 game also runs fine with all settings possible. Metro 2033 benchmark runs fine even in DX11 1366x768, until I turn DOF on, then black stripes appear again. Bad Company 2 (dx11 again) displays only a dark blue screen after running single player intro movie (the one that consists only of subtitles, e.g. "This is what really happened that day"). All games were patched to their latest versions. I thought I somehow have problems with dx11 but Unigine Heaven 2.1 runs fine. dx11 graphics demos like ATI Ladybug and Mecha also run fine. Nvidia's Stone Giant (dx11) too doesn't make any problems. Even STALKER Call of Pripyat benchmark runs well with all settings. So basically benchmarks run ok, dx11 games don't. On the other hand, Sniper Ghost Warrior runs completely fine, but it is only dx10 or dx9 game. Oblivion too runs great, so as even Quake III Arena. I even reinstalled Windows for 7 x86 (DirectX June), tried a couple of different Catalyst drivers before and after using Windows Update feature but the problem still persist. I even downloaded two different DX11 hotfixes from Microsoft but they solved nothing. I really feel hopeless about this and I'm considering returning my laptop. Any help would be much appreciated.