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Chapter 2
Overclocking
Operating a CPU at a higher frequency than its specification allows is called overclocking.
If the CPU frequency is set at a higher frequency than its specification allows, it may
or may not run at that freqency, depending on the quality of your CPU and the extent
to which the frequency has been overset. The mainboard manufacturer highly
discourages overclocking as it may result in data loss, CPU burn-out, system failure,
etc.
Many processors are frequency locked processors and are not able to perform
overclocking. Regardless of whether the processor is a frequency locked, overclocking
may cause some processors to hang when turning on the system. When the processor
hangs, the screen remains blank and the system does not boot. To solve this problem,
do the following:
1. Turn off the computer and then press the Home key on your keyboard
2. Turn on your computer, wait for five seconds and then release the Home key.
(Pressing the Home key allows the computer to boot at a low system speed.
For example, 66MHz external clock CPUs boot-up at 133MHz.)
3. Enter BIOS and reconfigure your CPU parameters as described in this section.
Voltage Configuration
Voltage Configuration
Voltage Configuration
Voltage Configuration
Voltage Configuration
There are two major processor types in general
use--single and dual voltage processors. Most
single voltage processors such as Pentium,
AMD-K5, and Cyrix 6x86 processors use a
single voltage value of 3.5v for both core and
I/O voltage settings. Most dual voltage
processors such as Pentium processors with
MMX technology and Cyrix 6x86L
processors use a dual voltage value of 2.8v
for core and 3.3v for I/O voltage settings. To
make the voltage setting for single and dual
voltage processors, simply set JP16~20
according to the table on the next page. The
voltage range supported by this mainboard
is detailed in Figure 2-5 below.
10
Vcore
JP16~20
1
1.8V
1
2V
1
2.2V
1
2.4V
1
2.5V
1
2.8V
Figure 2-5 Voltage Jumper Settings
Vcore
JP16~20
1
2.9V
1
3.1V
1
3.2V
1
3.3V
1
3.5V
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