https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/pepfx/ns-pepfx-_pep_low_power_epoch
_PEP_LOW_POWER_EPOCH (pepfx.h) - Windows drivers | Microsoft Learn
The PEP_LOW_POWER_EPOCH structure is used to provide data for a PEP_DPM_LOW_POWER_EPOCH notification (deprecated).
low powerwindows driverspepepochmicrosoft