Hello,
I have installed the 1.9 patch, dx11 ultra upgrade and high res textures. My system is...
Operating System: Windows Vista? Ultimate 64bit SP2
Motherboard : EVGA nForce 750i SLI FTW
Processor: Intel Core2 Quad CPU Q8300 @ 2.50GHz
Memory: 8190MB DDR2 800MHz RAM
Card name: NVIDIA GeForce GTX 260 x 2 SLI
Sound Card: ASUS Xonar D2X
Hard Drive: Western Digital Veliociraptor x2 RAID 0 Striped
Power: Tagan Piperock 900W

DirectX diagnostic is telling me I have DirectX11 installed.
[edit] Running the game on ultra at 1920 x 1200 [edit]
If I drop console after starting Crysis 2, I can read that my graphics card isn't recognised. When I start the game, neither graphics card will go above 60% load. Alternate Frame rendering is enabled via nVidia control panel.

I cannot enable DX11 and the computer cannot render anymore than 20 fps. Is this a programming issue or is the hardware out of date now?

Thanks

Nvidia 200 series doesnt support DX11 you would have to buy either 400 or 500 series graphics card to get all the new features that come with patch 1.9