New leaked betas for Nvidia, 174.93, for all flavours go here:
nVIDIA ForceWare 174.93 - Guru3D.com Forums
I haven't tried these yet but I'm sure at some stage I will be doing....

Started to run these now....Seem the same as the previous beta release 174.85

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AMD X2 6400+ 3.2GHz BLACK EDITION::SCYTHE SAMURAI COOLER::GA-M51 M/B::3GB DDR2 6400RAM::GEFORCE 8800GTS320/625/900MHz DRIVER '174.74' BETA::160 RAID 0 SATA2::SOUND BLASTER AUDIGY/'DANIELS' DRIVERS::LITE-ON DVD RW/PIONEER DVD::HIPER 530W MODULAR::THERMALTAKE ARMOUR Jr CASE::RAZER COPPERHEAD MOUSE::VISTA HOME PREMIUM SP1