ASRock P4VM900-SATA2 User Manual - Page 31

Boot Failure Guard Enable or disable the feature of Boot Failure Guard. Spread Spectrum The default value of this option is [Auto]. PCIE clock operatin mode Use this to select the operation mode of CPU and PCIE clocks. The default value is [Sync. mode]. Configuration options: [Async. mode] and [Sync. mode]. Ratio Status This is a read-only item, which displays whether the ratio status of this CPU is "Locked" or "Unlocked". If it shows "Unlocked", you will find an item Ratio CMOS Setting appears to allow you changing the ratio value of this CPU. If it shows "Locked", then the item Ratio CMOS S e t t i n g w i l l b e hidden. If you use the ratio value to time the CPU frequency, it will be equal to the core speed of the installed processor. Ratio Actual Value This is a read-only item, which displays the ratio actual value of this CPU. Max CPUID Value Limit For Prescott CPU only, some OSes (ex. NT4.0) cannot handle the function with disable. This should be enabled in order to boot legacy OSes that cannot support CPUs with extended CPUID functions. CPU Thermal Throttling You may select [Enabled] to enable P4 CPU internal thermal control mechanism to keep the CPU from overheated. Hyper Threading Technology To enable this feature, it requires a computer system with an Intel Pentium® 4 processor that supports Hyper-Threading technology and an operating system that includes optimization for this technology, such as Microsoft® Windows® XP. Set to [Enabled] if using Microsoft® Windows® XP, or Linux kernel version 2.4.18 or higher. This option will be hidden if the installed CPU does not support Hyper-Threading technology. 31