Asus P8Z77-V - Manual (Page 40)

2-16 Chapter 2: Hardware information
Chapter 2
3. EPU switch
Turning this switch to Enable will automatically detect the current PC loadings and
intelligently moderate the power consumption.
• The EPU LED (O2LED2) near the EPU switch lights when the switch setting is turned
to Enable. Refer to section 2.2.6 Onboard LEDs for the exact location of the EPU
LED.
• If you change the switch setting to Enable under the OS environment, the EPU
function will be activated after the next system bootup.
• You may change the EPU settings in the software application or BIOS setup program,
and enable the EPU function at the same time. However, the system will use the last
setting you have made.
For ensuring the system performance, turn the switch setting to Enable when the system is
powered off.