321 Studios D1692-BXX USB E/F Front Panel Header J46, PCI-X Slots 1 & 2 Bus Speed Override J53

Board Parts, Jumpers and Connectors

USB E/F (Front Panel Header) (J46)

J46

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USB E/F (Front Panel Header)

Signal	Pin	Pin	Signal
VCC	1	2	VCC

Data -	3	4	Data -
Data +	5	6	Data +
GND	7	8	GND
KEY	9	10	GND

PCI-X Slots 1 & 2 Bus Speed Override (J53)

J53

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PCI-X Slots 1 & 2 Bus Speed Override

Open – (Default) Allows PCI slots 1 & 2 to operate at up to 133 MHz (Maximum one PCI-X 133 device)

Closed – Forces PCI slots 1 & 2 to operate at a maximum bus speed of 100 MHz Close this jumper if using more than one PCI-X 133 card on this bus

Firewire Disable Jumper (J69)

J69

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Firewire Disable Jumper

Open – (Default) Enables onboard FireWire controller

Closed – Disables onboard FireWire controller

INTR – Chassis Intrusion Header (J77)

J77	INTR – Chassis Intrusion Header
￿￿￿	Active Low
	Pin 1:	Presence Detect	Pin 2:	Case Open	Pin 3:	GND

A26361-D1692-Z121-1-7619, Edition 1 11