Game runs at 45 FPS on my system.
Specs
Intel® Core™ i5-750 (8M Cache, 4 x 2.66 GHz, 3.2 GHz with Turbo)
Intel® DP55WB
Kingston® 10 GB (1 x KVR1333D3N9/2G + 2 x KVR1333D3N9/4G)
MSI® AMD® Radeon™ HD6770 (MD1GD5)
Seagate® Barracuda™ 7200 rpm 500 GB
Intel® 2.1 Channel
HP® LA2205wg
A4Tech® X6-10D
Dell® RT7D60
Cooler Master® 460 Watt
APC 1.5 KVA UPS (as backup power)