ASRock H55 Pro User Manual - Page 47
Boot Failure Guard
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adjust the Host frequency and PCIE frequency in the following two items. If you select [I.O.T.] (Intelligent Overclocking Technology), the system will automatically enable the overclocking function when your CPU is heavy loaded. BCLK Frequency (MHz) Use this option to adjust BCLK (Internal Base Clock) frequency. PCIE Frequency (MHz) Use this option to adjust PCIE frequency. Boot Failure Guard Enable or disable the feature of Boot Failure Guard. Spread Spectrum This item should always be [Auto] for better system stability. CPU Ratio Setting If the ratio status is unlocked, you will find this item appear to allow you changing the ratio value of this motherboard. QPI Frequency Use this item to select QPI frequency. Configuration options: [Auto], [4.800GT] and [4.266GT]. The default value is [Auto]. DRAM Frequency If [Auto] is selected, the motherboard will detect the memory module(s) inserted and assigns appropriate frequency automatically. DRAM Timing Control Use this item to control DRAM Timing. BIOS SETUP UTILITY Advanced DRAM Timing Control DRAM tCL DRAM tCL DRAM tRCD DRAM tRP DRAM tRAS DRAM tRFC DRAM tWR DRAM tWTR DRAM tRRD DRAM tRTP DRAM tFAW DRAM Command Rate DRAM Enhanced Training 8 [Auto] 8 [Auto] 8 [Auto] 20 [Auto] 48 [Auto] 8 [Auto] 4 [Auto] 6 [Auto] 5 [Auto] 21 [Auto] [Auto] [Auto] Min = 6 Max = 11 +F1 F9 F10 ESC Select Screen Select Item Change Option General Help Load Defaults Save and Exit Exit v02.54 (C) Copyright 1985-2005, American Megatrends, Inc. DRAM tCL Use this item to adjust the means of memory accessing. Configuration options : [Auto], [6] to [11]. DRAM tRCD This controls the number of DRAM clocks for TRCD. Configuration options: Configuration options: [Auto], [3] to [15]. 47