User Guide
Jumpers2: Dell OptiPlex G1 Systems

Jumpers: Dell OptiPlex G1 Systems

= jumpered
= unjumpered

For Celeron™ microprocessors, speed jumper setting are no longer required since settings are coded internally.

500MHZ Jumpered when the microprocessor's internal speed is 500 MHz.
450MHZ1 Jumpered when the microprocessor's internal speed is 450 MHz.
400MHZ1 Jumpered for Pentium II™ microprocessor when the internal speed is 400 MHz. Internally set for Celeron microprocessor.
350MHZ2 Jumpered when the microprocessor's internal speed is 350 MHz.
333MHZ2 Jumpered when the microprocessor's internal speed is 333 MHz.
300MHZ2 Jumpered when the microprocessor's internal speed is 300 MHz.
266MHZ3 Jumpered for 266 MHz.
BUS66M

(default)
External system clock speed is 66 MHz when jumpered.

External system clock speed operates at 100 MHz when not jumpered.
BIOS (default) Reserved. Do not change.
PSWD (default)

Password features are enabled.

Password features are disabled.

1 Either the 450 MHz or 400 MHz speed jumper pins must have a jumper plug installed.

2 One set of the speed jumper pins must have a jumper plug installed; otherwise, the system defaults to an undetermined speed.

3 As of April 19, 1999, the processor speed jumper was set at 266 MHz on Dell OptiPlex system boards shipped from the factory.

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