Supermicro SUPERSERVER 6013A-T, Руководство пользователя

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Chapter 5: Advanced Motherboard Setup
5-19
5-10 Jumper Settings
Explanation of
Jumpers
T o m o d i f y t h e o p e r a t i o n o f t h e
motherboard, jumpers can be used
to choose between optional settings.
Jumpers create shorts between two
pins to change the function of the
connector. Pin 1 is identified with a
square solder pad on the printed
circuit board. See the motherboard
layout pages for jumper locations.
Note: On two pin jumpers, "Closed"
means the jumper is on and "Open"
means the jumper is off the pins.
Connector
Pins
Jumper
Cap
Setting
Pin 1-2 short
3 2 1
3 2 1
Front Side Bus Speed
JP39 (see motherboard layout ) is
used to set the system (front side)
bus speed for the processors. It
is best to keep this jumper set to
Auto. This jumper is used to-
gether with the CPU Clock setting
in BIOS. See the table on the right
for jumper settings.
Jumper
Position
Pins 1-2
Pins 2-3
Open
Definition
Auto
400 MHz
533 MHz
Front Side Bus Speed
Jumper Settings (JP39)
CMOS Clear
JBT1 is used to clear CMOS (which will also clear any passwords). Instead of
pins, this jumper consists of contact pads to prevent accidentally clearing the
contents of CMOS.
To clear CMOS, first power down the system, then
1) Unplug the power cord(s)
2) With the power disconnected, short the CMOS pads with a metal object such
as a small screwdriver
3) Remove the screwdriver (or shorting device)
4) Reconnect the power cord(s) and power on the system.
Note: Do not use the PW_ON connector to clear CMOS.