Chapter 4: BIOS L2 Cache BG Scrub Allows L2 cache RAM to be corrected when idle. Options are Disabled and various times in nanoseconds and microseconds. Data Cache BG Scrub Allows L1 cache RAM to be corrected when idle. Options are Disabled and various times in nanoseconds and microseconds. IOMMU Option Menu IOMMU Mode IOMMU is supported on Linux-based systems to convert 32-bit I/O addresses to 64-bit. Options are Disabled , Best Fit and Absolute. Selecting the Best Fit or Absolute settings allows the user to select aperture size. Memory Ticking Parameters Allows the user to select which CPU Node's timing parameters (memory clock, etc.) to display. Options are CPU Node 0 and CPU Node1.
South Bridge Confi guration Audio CODEC Interface Use this setting to Enable or Disable the internal ACI. MAC Interface Use this setting to Enable or Disable the internal 802.3 MAC. IO4 MAC Interface Use this setting to Enable or Disable the IO4 internal 802.3 MAC. CPU Spread Spectrum This setting is used to enable spread spectrum for the CPU. Options are Dis- abled and Center Spread. SATA Spread Spectrum This setting is used to enable spread spectrum for the SATA. Options are Dis- abled and Down Spread. 4-17