IBM MICRO TOWER 2169 Hardware Maintenance Manual

Contents

59PCI Health Status OptionOn mainboards which support hardware monitoring, this itemlets you monitor the parameters for critical voltages, criticaltemperatures, and fan speeds.If this option is active on your system, we recommend that youaccept the default values.Frequency Control OptionThis item allows you to set the clock speed and system bus foryour system. The clock speed and system bus are determinedby the kind of processor you have installed in your system.Auto Detect DIMM/PCI Clk Default: DisabledWhen this item is enabled, BIOS will disabled the clock signal offree DIMM and PCI slots.CPU Internal Core Speed Default: AutoUse this item to automatically set up the mainboard for the kindof processor that you have installed. Set this item to the ratedinternal clock speed of the installed processor. If you set this toManual, two new items appear: CPU/DIMM/PCI Clock and CPUClock Ratio.Spread Spectrum Default: DisabledIf you enable spread spectrum, it can significantly reduce theEMI (Electro-Magnetic Interference) generated by the system.CPU/DIMM/PCI Clock CPU Clock ratioThese items appear if you have set the CPU Internal CoreSpeed to Manual. Use the CPU/DIMM/PCI Clock to set thesystem bus frequency for the installed processor (usually 133MHz,100 MHz or 66 MHz). Then use CPU Clock Ratio to set amultiple. The multiple times the system bus must equal the corespeed of the installed processor e.g. 3.5 (multiple) x 100 MHz(system bus) = 350 MHz (installed processor clock speed).