Dell OptiPlex GX1 Installation Manual page 5

NOTICE: Make sure your system is turned off before you change a jumper setting. Otherwise, damage to your system or
unpredictable results may occur.
A jumper is referred to as open or unjumpered when the plug is pushed down over only one pin or if there is no plug at all. When the plug is pushed
down over two pins, the jumper is referred to as jumpered. In some documents, the jumper setting may be shown in text as two numbers, such as
1-2. The number 1 is printed on the circuit board so that you can identify each pin number based on the location of pin 1.
Figure 6 shows the location and default settings of the jumper blocks on your system board. See
functions of your system's jumpers.
Figure 6. System Board Jumpers
Table 1. System-Board Jumper Settings
Jumper Setting
PSWD
BIOS
BUS66M
266MHZ*
300MHZ*
333MHZ*
350MHZ*
400MHZ*
450MHZ*
500MHZ*
* The correct microprocessor speed is automatically detected and set by the system. Do not change the settings of these jumpers.
The system can operate with a microprocessor speed up to 600 MHz.
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary in your online System User's Guide.
jumpered
System Board and Riser Board Labels
Table 2 lists the labels for connectors and sockets on your system board and riser board, and it gives a brief description of their functions.
Description
Password features are enabled.
Password features are disabled.
Reserved (do not change).
Reserved (do not change).
Reserved (do not change).
Reserved (do not change).
Reserved (do not change).
Reserved (do not change).
Reserved (do not change).
Reserved (do not change).
Reserved (do not change).
unjumpered
Table 1 for the designations, default settings, and