When AMD launched Ryzen 7 and Ryzen 5 earlier this year, it recommended that reviewers test with Windows 10’s power plan set to “High Performance,” as opposed to the “Balanced” configuration we typically prefer for testing and that Windows uses by default. Now, the company has released a new chipset driver that will add and automatically activate a power profile that gives Ryzen more control over its own power states.
The problem initially occurred because of a mismatch in how AMD’s SenseMI technology operates compared with Windows’ native power management. SenseMI is AMD’s brand name for a set of technologies related to power management, fine-grained clock speeds, and prefetch behaviors. In this case, AMD designed SenseMI to make changes to the CPUs clock and voltage with as little as 1ms latency between frequency and voltage shifts. The problem is, this runs counter to Windows 10’s own power management, which sets higher thresholds and longer timers when transitioning in and out of P-states (Performance States).