IBM eServer 232 xSeries User Reference Manual page 48

The following table describes the function for each switch.
Switch
number
Table 2. Switches 1-8.
34
IBM xSeries 232: User's Reference
Switch
description
1-4 Reserved.
5 Clock frequency selection. The default setting is Off.
When On, the host bus speed is 100 MHz. When Off, the host bus speed
is 133 MHz. The switch should always be set to Off to optimize the system
performance. Setting switch 5 to On greatly reduces system performance.
6 Password override.
Toggling this switch allows one opportunity to enter the Setup Utility to
change or delete the power-on password.
7 Reserved. The default setting is Off.
8 Power-on override. The default setting is Off (disabled).
When On, overrides the power-on switch and forces power-on mode. The
system will always start without the use of the power-on switch.
Note: When power-on switch is set to the On position you can not power
down from the front panel.