Re: 9600M GT won't throttle up under load
I advise against modifying your notebooks' performance levels unless you're aware of all the implications, such as interaction of your changes with other VBIOS settings and the NVIDIA graphics driver. You'll also need to be sure the effective settings will fit your notebook's power and thermal budgets, etc..
For what it's worth, we were able to investigate the performance level switching problem on Linux recently and determined that current NVIDIA Linux graphics driver releases are unable to obtain certain system specific data that complement the VBIOS on recent MXM based notebooks with NVIDIA GPUs. Without these data, the NVIDIA Linux graphics driver limits itself to safe performance levels. We hope to address this problem in a future 185.xx driver release.