Abit KD7-B User Manual page 47

BIOS Setup
Normally, we do not recommend that you use the "User Define" option to setup CPU speed and
multiplier factors. This option is for setup of future CPUs whose specifications are still unknown. The
specifications of all present CPUs are included in the default settings. Unless you are very familiar with
all CPU parameters, it is very easy to make mistakes when you define the external clock and the
multiplier factor by yourself. When you complete the setting in this option, the POST will not check if the
actual running speed is the same as the one you set.
User Define:
WARNING: The wrong settings of the multiplier and external clock in certain circumstances may cause
CPU damage. Setting the working frequency higher than the PCI chipset or processor specs, may cause
abnormal memory module functioning, system hangs, hard disk drive data lose, abnormal functioning of
the VGA card, or abnormal functioning with other add-on cards. Using non-specification settings for your
CPU is not the intention of this explanation. These should be used for engineering testing, not for normal
applications.
If you use non-specification settings for normal operation, your system may not be stable, and may affect
system reliability. Also, we do not guarantee the stability and compatibility for settings that are not within
specification, and any damage of any elements on the motherboard or peripherals, is not our
responsibility.
CPU FSB Clock (MHz):
This item sets the CPU Front Side Bus speed from 100 to 250. Due to the specification limit of the CPU
you installed, the speed you set over its standard bus speed is supported, but not guaranteed.
Ratio (FSB:AGP:PCI):
This item sets the ratio among the clock of FSB, AGP, and PCI. Take the 4:2:1ratio for instance, if the
FSB clock is 133MHz (133 x 4/4), the AGP clock will be 66MHz (133 x 2/4), and the PCI clock will be
33MHz (133 x 1/4).
Multiplier Factor:
This item sets the multiplier factor for the CPU you installed.
NOTE: Some processors might have this multiplier factor locked, so there is no way to choose a higher
multiplier factor.
Enhance For Benchmark:
This option improves your processor and system performance.
Solution in case of booting problem due to invalid clock setup:
Normally, if the CPU clock setup is wrong, you will not be able to boot. In this case, turn the system off
then on again. The CPU will automatically use its standard parameters to boot. You can then enter the
BIOS Setup again and set up the CPU clock. If you can't enter the BIOS setup, you must try turning the
system on a few times (3~4 times) or press <INSERT> when turning on, and the system will
automatically use its standard parameters to boot. You can then enter BIOS SETUP again and set up the
new parameters.
When you change your CPU:
This motherboard has been designed in such a way that you can turn the system on after having inserted a
CPU in the socket without having to configure any jumpers or DIP switches. If you change your CPU,
normally you just have to turn off the power supply, change the CPU and then set up the CPU parameters
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User's Manual