You can edit the rivatuner .cfg file to add the device id of your next gen hardware which will allow you to use things like LOD, Fan control and other non-oc settings.
As is the case currently with the GTX480, Rivatuner has not been updated to be used with GTX480 (because it fresh off the shelves atm).
Go into your program folder files in your C: drive (os drive), look for the rivatuner folder.
Right click and edit the .cfg file in notepad.
In this instance we are adding the GTX 480:
Device ID : 06c0 for 480
add this line:
G200 = 06C0-06FF
into the [GPU_10DE] section
and this line:
DEV_06c0 = "NVIDIA GeForce
GTX 480"
into the [VEN_10DE] section add