Untied Overclocking Technology - ASROCK X79 Extreme9 User Manual

2.19 Untied Overclocking Technology

This motherboard supports Untied Overclocking Technology, which means during
overclocking, BCLK enjoys better margin due to fixed PCIE buses. Before you
enable Untied Overclocking function, please enter "Overclock Mode" option of UEFI
setup to set the selection from [Auto] to [Manual]. Therefore, BCLK is untied during
overclocking, but PCIE buses are in the fixed mode so that BCLK can operate under
a more stable overclocking environment.
Please refer to the warning on page 9 for the possible overclocking risk
before you apply Untied Overclocking Technology.
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ASRock X79 Extreme9 Motherboard