This means your processor speed will vary (theoretically speaking) from 0.3GHz (10% of 3.00 GHz) and 2.7GHz (90% of 3.00GHz) P-state, depending upon the usage. In the Balanced power scheme, the Minimum Processor state is to 10% and maximum to 90%. The Ultimate Performance plan is a preset power scheme which disables all the power management features that Windows normally has.
But, what exactly does the Ultimate Performance power scheme do? What is the Ultimate Performance power plan?