Just so ya know...NVIDIA Rolls Out GeForce 327.23 WHQL Drivers
http://www.techpowerup.com/191149/nvidia-rolls-out-geforce-327-23-whql-drivers.html...during install of the 327.23 drivers, the installer asks for Microsoft .NET Framework 4, for use with the "GeForce to SHIELD streaming". However, the drivers them selves don't need this, BUT, after installing the 327.23 drivers Windows Update will download Security Updates for Microsoft .NET Framework 4 ....even if you are only running, Microsoft .NET Framework 3.5.1.
Personally, I just reverted back to the 326.80 drivers.