Thunder i7520 / Thunder i75 20 R Chapter 3: Board Installation
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3.1. 8 – PCIX -2 Channel B Maximum F requency
JP9
(For PCIX2- S1 PCI -X slot)
OPEN: 133/100/66 MHz
(Default)
CLOSE: 100/66 MHz
JP9 is for the onboard secondary PXH I/O
Bridge chip (PXH -2) Channel B PCI -X bus
frequency setting.
The PCIX2 -S1 slot is the only device on this
PCI -X bus.
3.1. 9 – External Speaker Header ( SPK )
Pin 2 –3
:
Enable onboard buzzer
(Default)
Pin 1 an d Pin 4
: For connecting
an external chassis speaker
(with disabling onboard buzzer)
