User Manual
ASUS TUF Z270 MARK 2 BIOS Manual
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
performance. Use the <+> or <-> to adjust the value. The values range from 98.0 MHz
to 538.25 MHz.
We recommend you to set the value based on the CPU specication, as high BCLK
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.
Conguration options: [Auto] [Disabled] [Enabled]
ASUS MultiCore Enhancement
[Auto] This item allows you to maximize the oveclocking performance optimized
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.
Conguration options: [Auto] [1] – [31]
CPU Core Ratio
This item allows you to set the CPU core ratio limit per core or synchronize automatically to
all cores.
Conguration options: [Auto] [Sync All Cores] [Per Core]
When the CPU Core Ratio is set to [Sync All Cores], the following item appears.
1-Core Ratio Limit
Congure the 1-Core Ratio Limit value that must be higher than or equal to the 2-Core
Ratio Limit.
When the CPU Core Ratio is set to [Per Core], the following item appears.