bug FarCry 2 with sufficient Rig

I just installed FarCry 2 but it is impossible to play, this lag to death as soon as I shoot or what.
I was in early 1200 * 1024 and while very high I thought it was too (even if it should proceed normally I think) when I put to test in 640 * 480 at most low and issue is still there.
I tried to uninstall reinstall, always the same
I tested with the new nvidia driver optimized for not FarCry 2
and the steady march last driver not

I pass on all the big games in depth (the Crysis and many others ...) so I think a problem or driver incompatibility of gear.

That is my configure in case:

• Core 2 Quad Q6600
• NVIDIA GeForce 8800GTS 512MB
• ASUS P5K
• 2GB gskill extreme PC6400
• Seagate Barracuda 320GB
• antec Earthwatts 500

I run on Windows XP Pro SP2 32bits.

thank you in advance

strange indeed

you have to patch the game?

I have not patched the games.
I will test it all the time to put on a single core, it is not optimized multi?

I do not know for 2! 3D engine is just not be optimized, and bizarre from Crytek is precisely because they are above the talk about them!

not actually is not very clear bug, it is not honest kind of anomaly

tries to manage energy in parametrizes windows for better performance!