Asus P9X79-E WS - Manual (Page 36)

3. EPU switch
Turning this switch to Enable will automatically detect the current PC loadings and
intelligently moderate the power consumption.
For ensuring system performance, turn the switch setting to Enable when the system is
powered off.
4. TPU switch
Turning this switch to Enable will automatically optimize the system for fast, yet stable
clock speeds.
For ensuring system performance, turn the switch setting to Enable when the system is
powered off.
2-12 Chapter 2: Hardware information