2.4.3 PCI-X Slot 1 Jumper Setting:
Header CN8 controls PCI-X Slot 1 setting. When CN8 is open, slot 1 is set to 133MHz. When CN8 is on, slot 1 is set to 100MHz. The frequencies describe here are maximum operating frequencies. If PCI-X channel is shared with other devices, then maximum operating frequency cannot be achieved. Refer to the following diagram for the location of CN8.