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Installing the Motherboard

Reset Switch

Supporting the reset function requires connecting pin 5 and 7 to a momentary-

contact switch that is normally open. When the switch is closed, the board resets and

runs POST.

Power Switch

Supporting the power on/off function requires connecting pins 6 and 8 to a momen-

tary-contact switch that is normally open. The switch should maintain contact for at

least 50 ms to signal the power supply to switch on or off. The time requirement is

due to internal de-bounce circuitry. After receiving a power on/off signal, at least two

seconds elapses before the power supply recognizes another on/off signal.

Power/Sleep/Message waiting LED

Connecting pins 2 and 4 to a single or dual-color, front panel mounted LED provides

power on/off, sleep, and message waiting indication.

This concludes Chapter 2. The next chapter covers the BIOS.

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ECS A785GM-AD3 Specifications

General

Number of memory slots	4
Maximum internal memory	8 GB
Processor socket	Socket AM3
Processor manufacturer	AMD
USB 2.0 connectors	8
Power fan connector	Yes
Number of SATA connectors	5
PS/2 ports quantity	2
USB 2.0 ports quantity	6
Ethernet LAN (RJ-45) ports	1
Firewire (IEEE 1394) ports	-
Audio chip	Realtek ALC888S
Certification	ROHS, EuP
Motherboard chipset	AMD 785G
Audio output channels	7.1 channels
Motherboard form factor	ATX
Compatible operating systems	Windows Vista, 7
PCI slots	3
Maximum graphics card memory	512 MB
RAID levels	0, 1
LAN controller	Realtek RTL8111DL
Networking features	Gigabit Ethernet
BIOS type	AMI
BIOS memory size	64 Mbit