PDC E2200 2.2GHz
GF 9600GT 512MB
4GB RAM-800
WinXP Pro SP3
All detail mode in C2 AdvancedGraphicsOptions: Medium, MSAA 2x, Edge AA, Anisotropy x16, Fov 100 (thats probably decrease fps a little)
Settings off: Motion & Radial Blur, FSAA, SSAO, Bloom, HDR
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Minimum fps, when its 'really hot outdoor action

' - 25. Avarage 30-35-45 fps (45 and more in buildings etc. of course).
Not good, not bad, still i can play on my 2,5 years old low-end pc.