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ASUS K7M User’s Manual58
4. BIOS SETUP
4. BIOS SETUP
Advanced Chipset
4.4.2 Advanced Chipset Setup
CPU Frequency Selection [100Mhz]
This field allows you to select the CPU external frequency (bus frequency), which
the clock generator sends to the CPU, DRAM, and PCI bus. The external frequency
multiplied by the bus multiple equals the CPU’s internal frequency (the advertised
CPU speed). You may select [By Jumper] to adjust the frequency through the moth-
erboard DIP switches. Available options: [By Jumper] [90 Mhz] [95 Mhz] [100
Mhz]...[150 Mhz]
Configure SDRAM Timing by SPD [Enabled]
This sets the optimal timing for the following 5 items, depending on the memory
modules that you are using. The Setup default [Enabled] configures the following 5
items by reading the contents in the SPD (Serial Presence Detect) device. This 8-pin
serial EEPROM device stores critical parameter information about the module, such
as memory type, size, speed, voltage interface, and module banks.
Page Idle Timer
This controls the amount of time in HCLKs that the DRAM controller waits to close
a DRAM page after the CPU becomes idle. NOTE: To make changes to this field,
the Configure SDRAM Timing by SPD field must be set to [Disabled]. Available
options: [1 Cycle] [8 Cycles] [32 Cycles] [64 Cycles]
WARNING! Selecting a frequency higher than the CPU manufacturer recom-
mends may cause the system to hang or crash. If you can not start the system
after overclocking the CPU, you must clear CMOS to erase your configuration
and then the system will be able to run at the Setup default, 100MHz.