Poor performance in the demo.

[FreonTrip]

The system's actually on the trim side - other than Microsoft Security Essentials, nothing ostentatious is rampaging about. The Left 4 Dead games, the Penumbra collection, and F.E.A.R. have all run with varying degrees of success, so I'm keen to get to the bottom of this problem. I'll perform a thorough performance audit, starting with disabling Aero, and update this tomorrow with results. It bears mentioning that the game's run beautifully on an Athlon X2 5050e with 2 gigs of RAM and a 512 MB 9600GSO, running Slackware 13.1, and was creepy enough that it kept me up until 3 in the morning...

Incidentally, is Amnesia multithreaded?

Edit: Updated drivers, disabled Aero, and lo and behold, performance is pretty bearable at low-to-medium detail settings at 800x600. Aero's the culprit - I estimate performance dropped by at least half when it's enabled. Thanks for the help, all!