ASRock P4S55FX User Manual - Page 28

USB Controller: Use this to enable or disable the use of USB controller. USB 2.0 Support: Use this to enable or disable the use of USB 2.0 support. USB Device Legacy Support: Use this to enable or disable the support to emulate legacy I/O devices such as mouse, keyboard,... etc. VDDQ Voltage: Use this to select VDDQ voltage between [1.66V] and [1.57V]. VCCM Voltage: Use this to select VCCM voltage between [2.62V] and [2.55V]. IDE Driving Strength: Select [Normal] or [Strong] for IDE driving strength. ZCLK/AGP/PCI Frequency mode: If the item CPU Host Frequency is set to [Manual], it allows you to set the value for this item. You may set this item to synchronize with CPU Host Frequency or fix it at 132/66/33 MHz. DRAM Access Mode: The default value is [Auto], which will automatically select the proper access mode for the system. You may select between [Single Channel] and [Dual Channel] if you have properly set the dual channel memory configuration. DRAM CAS Latency: This is used to adjust the means of memory accessing. Configuration options: [Auto], [2T], [2.5T], [3T]. Please note that not all the DDR DIMMs can support CAS latency=3T. DRAM Precharge Time: Use this to select among [Auto], [3T], [2T], [4T], and [5T] for DRAM Precharge Time . DRAM RAS to CAS Delay: Use this to select among [Auto], [3T], [2T], [4T], and [5T] for DRAM RAS to CAS Delay . DRAM ACT to Precharge Delay: Use this to select among [Auto], [6T], [7T], [5T], [4T], [8T] and [9T] for DRAM ACT to Precharge Delay . DIMM1, 2 Address/Command Rate: Use this to select among [Auto], [2T], and [1T] for DIMM1, 2 Address/Command Rate . DIMM3, 4 Address/Command Rate: Use this to select among [Auto], [2T], and [1T] for DIMM3, 4 Address/Command Rate . DIMM1, 2 FWDSDCLK Delay: Use this to select [Auto] or other values for DIMM1, 2 FWDSDCLK delay. DIMM3, 4 FWDSDCLK Delay: Use this to select [Auto] or other values for DIMM3, 4 FWDSDCLK delay. 28