ASROCK H55M R2.0 User Manual page 35

Good Night LED
Enable this option to turn off Power LED and Lan LED when the system is
power on. The keyboard LED will also be turned off in S1, S3 and S4 state.
The default value is [Disabled].
Overclock Mode
Use this to select Overclock Mode. Configuration options: [Auto], [Manual],
[I.O.T.] and [Optimized]. The default value is [Auto]. If you select [Manual],
Untied Overclocking function is enabled. Please refer to page 31 for the
details of Untied Overclocking Technology. Therefore, you are allowed to
adjust the Host frequency and PCIE frequency in the following two items.
If you select [I.O.T.] (Intelligent Overclocking Technology), the system will
automatically enable the overclocking function when your CPU is heavy
loaded.
BCLK Frequency (MHz)
Use this option to adjust BCLK (Internal Base Clock) frequency.
PCIE Frequency (MHz)
Use this option to adjust PCIE frequency.
Boot Failure Guard
Enable or disable the feature of Boot Failure Guard.
Boot Failure Guard Count
Enable or disable the feature of Boot Failure Guard Count.
Spread Spectrum
This item should always be [Auto] for better system stability.
CPU Ratio Setting
If the ratio status is unlocked, you will find this item appear to allow you
changing the ratio value of this motherboard.
IGD Frequency
Use this option to adjust IGD frequency.
QPI Frequency
Use this option to adjust QPI frequency.
DRAM Frequency
If [Auto] is selected, the motherboard will detect the memory module(s)
inserted and assigns appropriate frequency automatically.
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