Asus Rampage IV Formula - Manual (Page 94)

3-16 Chapter 3: BIOS setup
Chapter 3
CPU Spread Spectrum [Disabled]
[Auto] Loads the optimized setting for the system.
[Disabled] Enhances the BCLK overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.
PCIE Spread Spectrum [Disabled]
[Auto] Loads the optimized setting for the system.
[Disabled] Enhances the PCIE overclocking ability.
[Enabled] Sets to [Enabled] for EMI control.
Memory Tweakers’ Paradise
PCIE CLK Skew [Auto]
Configuration options: [-63] – [-1] [Auto] [+1] – [+63]
CPU I/O Skew [Auto]
Configuration options: [-63] – [-1] [Auto] [+1] – [+63]
CPU I/O Drive Strength [Auto]
Configuration options: [-63] – [-1] [Auto] [+1] – [+63]
CPU Tweakers’ Paradise