Ok, I've been tracing an issue my box is having with Sleep (S3) and the maximum P-State set in the Active Power Plan after waking. After my machine wakes, the maximum P-State of the Active Power Plan is always set to 5%. This happens no matter the Power Plan used: Balanced, High Performance, or the custom one the OEM tuning software installs. It happens even when the OEM software is disabled and I'm just using the default power plans. It happens even after the Power Plans have been reset to defaults, with no changes. The machine sleeps fine, wakes fine. After it wakes though, I have to go in and reset the maximum P-State back to 100% if I want it to run at the appropriate speed.
I've done a whole lot of googling and I've only found a couple other sites where behavior like this has been described. In all those cases, I've found no resolution. Any help is appreciated.