Asus TUF Z270 MARK 2 Bios Manual page 21

When the Ai Overclock Tuner is set to [Manual] or [XMP], the following items appear.
BCLK Frequency
This item allows you to set the BCLK (base clock) frequency to enhance the system
frequencies may damage the CPU permanently.
BCLK Spread Spectrum
Enable this item to reduce peak value of EMI emissions, or disable for a more accurate Base
Clock.
ASUS MultiCore Enhancement
by ASUS core ratio settings.
[Disabled] This item allows you to set to default core ratio settings.
AVX Instruction Core Ratio Negative Offset
This item allows you to subtract a value from your core ratio at which AVX applications run.
CPU Core Ratio
all cores.
When the CPU Core Ratio is set to [Sync All Cores], the following item appears.
1-Core Ratio Limit
Ratio Limit.
When the CPU Core Ratio is set to [Per Core], the following item appears.
ASUS TUF Z270 MARK 2 BIOS Manual
21