obviously first pic shows old driver suffers low gpu usage.. the new ones boost gpu usage so the fps but still not using 98% according to second pic..

Increases gaming performance by up to 12% for dual-core CPUs in CPU-limited cases.
i hope this thing brings some boost for old quads too

NVIDIA Update

In Release 275, NVIDIA Update adds automatic SLI, multi-GPU, and antialiasing (AA) profile updates. These profile updates are automatically downloaded from NVIDIA and silently installed on your PC, keeping it up-to-the-minute with the latest game profiles. When you install a Release 270 or later GeForce driver from www.nvidia.com, you will be presented with the option to install NVIDIA Update. Click here to learn more about NVIDIA Update.