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16 ASUS MEL-M User’s Manual
III. HARDWARE SETUP
Motherboard Settings
III. H/W SETUP
WARNING! Do not overclock your processor. Frequencies above 66MHz ex-
ceed the specifications for the onboard Intel Chipset and are not guaranteed to be
stable. Overclocking can cause undue stress on the CPU and motherboard. It
may result in a slower speed or other unpredictable outcomes. The table on the
following page shows the approved CPUs and their settings.
4. CPU External (BUS) Frequency Selection (DIP-Switch 1, 2, 3, 4)
These function switches tell the clock generator what frequency to send to the
CPU. These allow the selection of the CPU’s External frequency (or BUS Clock).
The BUS Clock times the BUS Multiple equals the CPU's Internal frequency
(the advertised CPU speed).
5. CPU to BUS Frequency Multiple (DIP-Switch 7, 8, 9, 10)
These function switches set the frequency multiple between the Internal fre-
quency of the CPU and the External frequency (called the BUS Clock) within
the CPU.
MEL-M CPU External Clock
(BUS) Frequency Selection
ON
12345678910
66.8MHz
66.8MHz
33.4MHz
CPU
AGP
PCI
→
→
→
MEL-M CPU : BUS Frequency Multiple
8.0x(8/1)
ON
12345678910
7.5x(15/2)
ON
12345678910
7.0x(7/1)
ON
12345678910
6.5x(13/2)
ON
12345678910
ON
12345678910
6.0x(6/1)
5.0x(5/1)
ON
12345678910
4.5x(9/2)
ON
12345678910
4.0x(4/1)
ON
12345678910
3.5x(7/2)
ON
12345678910
ON
12345678910
3.0x(3/1) 5.5x(11/2)
ON
12345678910
Set the DIP switches by the Internal speed of your processor as follows:
(BUS Frequency Switches) (Frequency Multiple Switches)
Intel CPU Model Speed Mult Freq. 1 2 3 4 7 8 9 10
Celeron (PPGA) 466MHz 7.0x 66MHz [OFF] [OFF] [OFF] [OFF] [ON] [OFF] [ON] [OFF]
Celeron (PPGA) 433MHz 6.5x 66MHz [OFF] [OFF] [OFF] [OFF] [OFF] [ON] [ON] [OFF]
Celeron (PPGA) 400MHz 6.0x 66MHz [OFF] [OFF] [OFF] [OFF] [ON] [ON] [ON] [OFF]
Celeron (PPGA) 366MHz 5.5x 66MHz [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [ON]
Celeron (PPGA) 333MHz 5.0x 66MHz [OFF] [OFF] [OFF] [OFF] [ON] [OFF] [OFF] [ON]
Celeron (PPGA) 300MHz 4.5x 66MHz [OFF] [OFF] [OFF] [OFF] [OFF] [ON] [OFF] [ON]