Asus P5E WS PROFESSIONAL User Manual page 49

2. PCI-X Speed setting (3-pin PCIX_SPEED1)
This jumper allows you to set the PCI-X slot's maximum frequency capability.
The jumper cap on pins 1-2: 133 MHz capability for the PCI-X slot.
The jumper cap on pins 2-3: 100 MHz capability for the PCI-X slot.
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P5E WS PRO
P5E WS Professional PCIX speed setting
ASUS P5E WS Professional
PCIX_SPEED1
1 2 2 3
133MHz 100MHz
(Default)
2-23