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U p g r a d i n g a n d E x p a n s i o n
Now adjust the processor multiplier and external bus clock speed switches
on the motherboard (in conjunction with the new processor's data sheet), as
in the following tables. Note that all other switch positions are reserved.
External bus clock
Frequency
66Mhz
60Mhz
50Mhz
Warning
Warning
Do not alter the processor or clock settings under normal operation unless
upgrading all the fitted processors. It could result in permanent damage to either
the motherboard or the processors.
Additional CPUs, 'C' and 'D'
If there are two processors fitted to the motherboard and if it is required to
fit a third+fourth processor, the extra processor board will need to be fitted.
The procedure for fitting processors to this extra board is identical to that for
the motherboard, but for safety and ease of assembly it is recommended to
be completed before installing the card in the system, on a suitable antistatic
surface or mat. The processors and VRMs must be exactly the same as the
ones fitted to the motherboard. The additional processor board must be
inserted in the slot at the top of the motherboard:
Figure 2-7 The additional CPU card
1.
VRM for processor 'D'
2.
VRM for processor 'C'
3.
ZIF socket for processor 'C'
1.
Disengage the termination board from its slot at the top of the
motherboard and place it in suitable packaging.
2/6
Processor bus multiplier
SW1-5
SW1-6
SW1-1
off
on
on
on
off
on
on
on
on
on
on
1
6
5
4.
5.
6.
SW1-2
SW1-3
SW1-4
on
on
on
off
on
on
on
off
on
off
off
on
on
on
off
2
3
4
Fan connection (if required)
Fan connection (if required)
ZIF socket for processor 'D'
Factor
x2
x2.5
x3
x3.5
x4
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