Originally Posted by Windseeker
Just for comparison: This is no general problem with nvidia-settings, on my 6200 it gives correct answer:
$ nvidia-settings -q BusRate
Attribute 'BusRate' (hostname:0.0): 8.
The valid values for 'BusRate' are in the range 1 - 8 (inclusive).
'BusRate' is a read-only attribute.
'BusRate' can use the following target types: X Screen, GPU.
Seems like you catched something.
A BusRate of null (on the 8200) would seem to correspond to the performance level