gnarbrag: The game runs fine at first but after a few minutes the game slows to a crawl. I've updated the drivers for my graphics card and set a lower resolution but it still happens. Does anybody know how to solve this?
Win7 32-bit
Intel Core Duo i3 3 Ghz
4 GB memory
NVIDIA GeForce GTS 250
That should be enough for medium settings, probably not more, because the GTS 250 is still the G92 GPU that just meets minimum specifications.
djlethal's point about texture size is important. Medium settings use small textures and low texture memory size, so this is usually a good starting point for minimum-spec cards.
Another possibility is overheating. Especially if that card has been in service for a couple years, its cooler may be clogged with dust. Well-designed graphics cards protect themselves by slowing down if they get too hot. A can of compressed air takes care of that problem.