Chapter 2: Installation
2-15
CMOS Clear
Refer to Table 2-25 for instructions
on how to clear CMOS. Always re-
move the AC power cord from the
system before clearing CMOS.
Note: For an ATX power supply,
you must completely shut down
the system, remove the AC power
cord, and then use JBT1 to clear
CMOS. Replace JBT1 back to the
pin 1-2 position before powering
up the system again. Do not use
the PW_ON connector to clear
CMOS.
Position
1-2
Position
2-3
Normal
CMOS Clear
Table 2-25
CMOS Clear Jumper Settings
(JBT1)
Jumper
Position
1-2
2-3
Definition
Normal
CMOS Clear
PCI 64 Speed Select
(P4DC6+/P4DCE+/P4DC6+II/
P4DCE+II only)
Jumper JPA3 allows you to
change the speed of the 64-bit PCI
slot. The default setting is 66
MHz. Note: If you have installed
a RAID card into the RAID adapter
port (P4DC6+/P4DC6+II only) and a
PCI slot into the 64-bit 66 MHz PCI
slot, you must set this jumper to
33 MHz. Refer to Table 2-26 for
jumper settings.
Jumper
Position
Open
Closed
Definition
66 MHz
33 MHz
Table 2-26
64-bit PCI Speed Select
Jumper Settings (JPA3)
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