S1856 Tomahawk BX/A+
15
INST
ALL
!!!!!
important!
1. Setting Jumpers
1-A. CPU Speed Settings (Jumpers JP10, JP11, JP12, JP13)
There are two steps to set the CPU speed. First, set the clock multiplier with
jumpers JP10 -13 according to the specification of your CPU using the chart
below. After the system is ready to boot up you will need to set the bus speed
in the BIOS setup. This is covered in detail in Chapter 3 of this manual.
Presently all Celeron CPUs use a 66MHz bus speed. Tyan does not recommend
operating CPUs, memory, or PCI Bus at higher than rated speed. Tyan takes no
responsibility for any problems related to overclocking any bus or component
on the system board.
Multiplier Bus Speed CPU spe ed
JP10
JP11
JP12
JP13
(set Jmprs
on board)
(set in
BIOS)
3.5
100
350
ON
OFF
OFF
ON
4
100
400
OFF
ON
ON
ON
66
300
100
450
66
333
100
500
66
366
100
550
66
400
100
600
6.5
66
433
ON
ON
OFF
OFF
7
66
466
ON
OFF
ON
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
4.5
5
5.5
6
JP10, JP11,
JP12, JP13
