EPU-6 Engine
Came with my board.
Turbo: 165.3MHz x 21 for 3472MHz @ 1.296V QPI = 2976MHz
Performance: 160.7MHz x 21 for 3374MHz @ 1.296V QPI = 2892MHz
Medium Power Saving: 157.3MHz x 21 for 3304MHz @ 1.256V QPI = 2832MHz
Max Power Saving: 155.6Mhz x 9 for 1400MHz @ 1.224V QPI = 2800MHz
Fan speeds change with them.
OR it can be set to auto which toggles between those pre-sets as it needs to and fiddles the fan speeds more smoothly. Not all that much between medium and turbo.
I've left the settings fairly tame, you can boost the bus speed on turbo up to +60MHz, currently at +5MHz. Performance won't adjust bus speed. Medium Power Saving can go down to -60MHz and Max Power saving will drop to whatever Mediums bus speed is minus 1-2MHz. Currently both are 0 MHz changes.