User Guide

16 ASUS MEL User’s Manual
III. HARDWARE SETUP
Dip Switches
III. H/W SETUP
4. CPU External (BUS) Frequency Selection (DIP1, 2, 3)
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 Ratio equals the CPU's Internal frequency (the
advertised CPU speed).
MEL CPU BUS Frequency Selection
CPU/AGP
PCI BUS
→
→
66.8MHz
33.4MHz
ON
12345678910
72MHz
36MHz
ON
12345678910
81MHz
40.5MHz
ON
12345678910
ON
12345678910
83.3MHz
41.7MHz
68.5MHz
34.2MHz
ON
12345678910
75MHz
37.5MHz
ON
12345678910
78MHz
39MHz
ON
12345678910
80MHz
40MHz
ON
12345678910
CPU/AGP
PCI BUS
→
→
5. CPU to BUS Frequency Multiple (DIP7, 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 CPU : BUS Frequency Multiple
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
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)
Set the function switches by the Internal speed of your processor as follows:
(BUS Frequency) (Frequency Multiple)
Intel CPU Model Speed Mult Freq. DIP1 DIP2 DIP3 DIP7 DIP8 DIP9 DIP10
Celeron (PPGA) 466MHz 7.0x 66MHz [OFF] [OFF] [OFF] [ON] [OFF] [ON] [OFF]
Celeron (PPGA) 433MHz 6.5x 66MHz [OFF] [OFF] [OFF] [OFF] [ON] [ON] [OFF]
Celeron (PPGA) 400MHz 6.0x 66MHz [OFF] [OFF] [OFF] [ON] [ON] [ON] [OFF]
Celeron (PPGA) 366MHz 5.5x 66MHz [OFF] [OFF] [OFF] [OFF] [OFF] [OFF] [ON]
Celeron (PPGA) 333MHz 5.0x 66MHz [OFF] [OFF] [OFF] [ON] [OFF] [OFF] [ON]
Celeron (PPGA) 300MHz 4.5x 66MHz [OFF] [OFF] [OFF] [OFF] [ON] [OFF] [ON]