ASRock P4S61 User Manual - Page 22
AGP/PCI Fix Frequency
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Chipset Configuration: Advanced AMIBIOS SETUP UTILITY - VERSION 3.31a Chipset Configuration [ Setup Help ] AGP Aperture Size Onboard VGA Share Memory USB Controller USB Device Legacy Support USB 2.0 Controller DRAM CAS# Latency MA 1T/2T Select CPU Thermal Throttling AGP / PCI Fix Frequency 64MB Auto Enabled Disabled Enabled Auto MA2T Auto Sync. to select the size of mapped memory for graphics data. F1:Help Esc:Previous Menu :Select Item +/-:Change Values Enter:Select Sub-Menu F9:Setup Defaults F10:Save & Exit AGP Aperture Size: It refers to a section of the PCI memory address range used for graphics memory. It is recommended to leave this field at the default value unless your AGP card requires other sizes. OnBoard VGA Share Memory: This allows you to select the size of share memory for onboard VGA. Onboard VGA will get better resolution if larger size of share memory is selected. USB Controller: Use this to enable or disable the use of USB controller. USB Device Legacy Support: Use this to enable or disable support to emulate legacy I/O devices such as mouse, keyboard,... etc. USB 2.0 Controller: Use this to enable or disable the use of USB 2.0 controller. DRAM CAS# Latency: This parameter controls the latency between the read command and the time the data available. MA 1T/2T Select: Use this item to meet the timing and loading condition for optimized result of DRAM address/control signals. The default value of this item is [MA2T], and other configuration options are [Auto] and [MA1T]. CPU Thermal Throttling: Select [Enabled] will enable P4 thermal control circuit to keep CPU from overheated. AGP/PCI Fix Frequency: Use this item to select AGP frequency to run synchronous or asychronous with the CPU host frequency among the following sets of values: [72 MHz / 36 MHz], [64 MHz / 32 MHz], [77 MHz / 39 MHz], [67 MHz / 34 MHz], and the default value is [Sync]. 22