I am aware NVIDIA has said in their previous documents that clip region is not “hardware accelerated” in GeForce cards. I just want to know if it is still the case in their latest and greatest GeForce cards. Can some of you confirm that with your cards?
I read somewhere that clip regions are acellerated on GF FX and newer.
the geforce nv3x generation does not accelerate clipping planes in hardware as far as my experience with them goes (i was forced to do clipping in the fragment program because of that 
)
sorry for my misslead. GF FX(NV3x) supports only one clip region in hardware. Only Quadros support up to 8 clip regions in HW.