ASRock P55 Pro User Manual - Page 50

3.3 OC Tweaker Screen In the OC Tweaker screen, you can set up overclocking features. BIOS SETUP UTILITY Main OC Tweaker Advanced H/W Monitor Boot Security Exit OC Tweaker Settings Overclock Mode BCLK Frequency (MHz) PCIE Frequency (MHz) Boot Failure Guard Spread Spectrum [Auto] [133] [100] [Enabled] [Auto] CPU Ratio Setting QPI Frequency DRAM Frequency 22 [22] 4.800GT [Auto] DDR3_1333 [Auto] DRAM Timing Control ASRock Vdrop control CPU Voltage DRAM Voltage VTT Offset Voltage PCH Voltage [With VDrop] [Auto] [Auto] [Auto] [Auto] Overclocking may cause damage to your CPU and motherboard. It should be done at your own risk and expense. Select Screen Select Item Enter Go to Sub Screen F1 General Help F9 Load Defaults F10 Save and Exit ESC Exit v02.54 (C) Copyright 1985-2005, American Megatrends, Inc. Overclock Mode Use this to select Overclock Mode. Configuration options: [Auto], [Manual], [I.O.T.] and [Optimized]. The default value is [Auto]. If you select [Manual], Untied Overclocking function is enabled. Please refer to page 47 for the details of Untied Overclocking Technology. Therefore, you are allowed to 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]. 50