Asus P4B - Manual (Page 40)

2-18 Chapter 2: Hardware information
2. CPU Core:Bus frequency multiple (SWITCH Switches 1-4)
This option sets the frequency multiple between the CPU internal and
external frequencies. This must be set in conjunction with the CPU Bus
Frequency.
Figure 2-23 CPU Core:Bus Frequency Multiple
P4B
®
SWITCH
8.0x
ON 1234
56789
1
0
ON 1234
56789
1
0
10.0x
ON 1234
56789
1
0
11.0x
ON 1234
56789
1
0
12.0x
13.0x
ON 1234
56789
1
0
14.0x
ON 1234
56789
1
0
15.0x
ON 1234
56789
1
0
16.0x
ON 1234
56789
1
0
17.0x
ON 1234
56789
1
0
ON 1234
56789
1
0
18.0x
ON 1234
56789
1
0
19.0x
ON 1234
56789
1
0
20.0x
21.0x
ON 1234
56789
1
0
22.0x
ON 1234
56789
1
0
23.0x
ON 1234
56789
1
0
24.0x
ON 1234
56789
1
0
P4B CPU Frequency
Multiple Selection
Make sure that the JEN jumper is set to jumper mode before setting
the above switches.
The option to set the CPU core:bus frequency multiple is available only
on unlocked CPUs. If you are using a locked CPU, setting the switches
does not produce any effect.