I just started TRYING to play it with the new system I built:
Gigabyte ga-970a-UD3, 4 gigs of RAM, AMD 4100 Quad Core running at 3.6, Gigabyte NVidia GeForce 520 with 1 gig onboard memory.
Runs like a wounded cow. Already tried the command line fixes and both DirectX settings.
I'll try a clean reboot and see what happens. Otherwise - off the drive. It's also the Steam version, so it should be up to date (all my drivers are, as I just installed everything.)
This should not be such a drag!