Well I don't have all the cool graphics. But I can play it. I think that a new vid card will enhance performance... here are my system specs from Dxdiag in windows.
Processor: AMD Athlon(tm) 64 Processor 3200+, MMX, 3DNow, ~2.2GHz
Memory: 1534MB RAM
Display Devices
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Card name: NVIDIA GeForce FX 5500
Manufacturer: NVIDIA
Chip type: GeForce FX 5500
In Game I am running 1024x768 res. textures set t0 128, Advance graphics off, Obj. Detail about 1/2 way, Ground(or Distance) about 1/2 way.. no horizon..
In Windows I have to run the same settings.. to get a steady 30 - 42FPS