I have an Acer Aspire 7750G-6662:
Intel Core i5-2430M, 2.4 GHz w/ Turbo Boost up to 3.0 GHz
AMD Radeon HD 6650m w/ 2GB VRAM
8GB RAM
By all accounts I should be able to play the game on solid medium settings, but I can just barely manage with everything off/low/minimum, in a window at 800x600, which is tiny and unplayable for its own reasons. Everything is choppy and stuttering; even the mouse in the pause and inventory menus seems to lag. If I jerk the camera to one side in game, it takes maybe a third of a second to respond at all. I've tried updating my drivers as much as possible, and I've tried a few mods to improve performance, but nothing seems to work. What am I missing? Am I out of luck?