Asus P8Z77-V PRO/THUNDERBOLT User Manual page 40

2. TPU switch
Turning this switch to Enable will automatically optimize the system for fast, yet stable
clock speeds.
For ensuring the system performance, turn the switch setting to Enable when the system is
powered off.
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The TPU LED (O2LED1) near the TPU switch lights when the switch setting is turned
to Enable. Refer to section 2.2.6 Onboard LEDs for the exact location of the TPU
LED.
If you change the switch setting to Enable under the OS environment, the TPU
function will be activated after the next system bootup.
You may use the TurboV and Auto Tuning feature in the TurboV EVO application,
adjust the BIOS setup program, or enable the TPU switch at the same time. However,
the system will use the last setting you have made.
Chapter 2: Hardware information