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HP Pavilion PCs - Motherboard and Jumper Settings for Systems with AMD Athlon Processor and an AMD Irongate (AMD-751) Chipset
The motherboard information in this document applies to the following HP Pavilion PCs:
This motherboard is carefully designed for the demanding PC user who wants High-performance features in a small package.
Figure 1: Motherboard Layout
Jumper locations and functions
CAUTION: Computer motherboards contain very delicate Integrated Circuit (IC) chips. To protect them against damage from static electricity, you should follow some precautions whenever you work on your computer. 1. Unplug your computer when working on the inside. 2. Use a grounded wrist strap before handling computer components. If you do not have one, touch both of your hands to a safely grounded object or to a metal object, such as the power supply case.
Vaux Setting (3VSBSLT)
This jumper allows you to select the voltage supplied to add-in PCI cards that require Vaux power (see Figure 2).
Figure 2: Vaux Settings
PS/2 Mouse Setting (MSDATA)
This jumper allows you to release IRQ12 for use by add-in cards (if you are not using a PS/2 mouse). Set to IRQ12 if you do not have a PS/2 mouse. Set to MSDATA if you want to use a PS/2 mouse (see Figure 3).
Figure 3: PS/2 Mouse Settings
Voltage I/O Setting (VIO)
This jumper allows you to select the voltage supplied to the DRAM, chipset, AGP, and PCI, among others. The default voltage is set at 3.4V. A higher voltage is used for processor overclocking.
WARNING: Using a higher voltage may help when overclocking but may shorten the life of the component. It is strongly recommended that the default setting be used.
Figure 4: Voltage I/O settings
NOTE: * The VIO Jumper setting 3-4 is 3.56 volts on the following HP Pavilion models 8662C, 9686C, 9694C, 9695C and 8772C PCs
CPU External Frequency Setting
Multiple frequency settings are not available because AMD Athlon processors have locked frequency multiples.
CMOS Real Time Clock (RTC) RAM Setting (R182)
You can clear the CMOS memory of date, time, and system passwords (which may have been set during BIOS Setup) by erasing the CMOS Real Time Clock (RTC) RAM. The RAM data containing system setup information is powered by the onboard button cell battery (see Figure 5).
To erase the RTC RAM
Figure 5: CMOS Real Time Clock Settings
NOTE: This document is based on information from the AMD K7M E539 and E541 motherboard manuals.