Note: PhysX 08.08.18 WHQL packed with the driver, but still did not support all legacy PhysX runtime through CUDA. Release note saids only games uses physX SDK version 2.7.3, 2.7.2, 2.8.0 and 2.8.1 can be accelerate by GeForce cards. With out CUDA support on legacy PhysX runtime, some old games still need a Ageia PhysX processor to play.
CPU: Intel Core 2 QX9650 OC 400MHzX10
Mobo: Asustek Maximus Extreme
Memory: A-DATA DDR3 1066 1Gx2
GFX card: GeForce 9800GTX+
Driver: Forceware 175.19 and 177.92
OS: Windows Vista
In 177.92 release note, NVIDIA hints that 177.92WHQL versus v175.19 WHQL driver can show lots of improvements:
In our test with 9800GTX+ setup, 177.92 does very well, but not as good as release note saids. We can see there is no any improvements in Bioshock, and in other games the new driver showed us some improvement but still not good enough.
Because we only uses 9800GTX+ so we are not sure if other cards shows huge improvements like release note said.