It's a beta and is mainly for SLI users.

http://www.geforce.com/Drivers/Results/40030

- Fixes corruption in Crysis 2 with SLI and lower quality shadow settings.

I always had around 60-70fps, now I get freaking 80-100fps on Ultra settings!
(tested with MSI Afterburner)

I love my twin GTX SC 580 SLI

ty, 4GEN7. I see bump on 2x460's as well.