ASROCK M3N78D - V1.0 - Page 22

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ATX 12V Power Connector Please note that it is necessary
(8-pin ATX12V1) to connect a power supply with
(see p.10, No. 2) ATX 12V plug to this connector.
Failing to do so will cause power
up failure.
20-Pin ATX Power Supply Installation
Though this motherboard provides 24-pin ATX power connector,
it can still work if you adopt a traditional 20-pin ATX power supply.
To use the 20-pin ATX power supply, please plug your power
supply along with Pin 1 and Pin 13.
12
1
24
13
Serial port Header This COM1 header supports a
(9-pin COM1) serial port module.
(see p.10, No.21)
CCTS #1
DDSR#1
DDTR #1
RRXD 1
DDCD#1
TTXD1
GND
RRTS #1
RRI#1
1
8 5
4 1
Though this motherboard provides 4-Pin CPU fan (Quiet Fan) support, the 3-Pin
CPU fan still can work successfully even without the fan speed control function.
If you plan to connect the 3-Pin CPU fan to the CPU fan connector on this
motherboard, please connect it to Pin 1-3.
3-Pin Fan Installation
Pin 1-3 Connected
ATX Power Connector Please connect an ATX power
(24-pin ATXPWR1) supply to this connector.
(see p.10, No. 7)
12
1
24
13
4-Pin ATX 12V Power Supply Installation
Though this motherboard provides 8-pin ATX 12V power connector, it can still work
if you adopt a traditional 4-pin ATX 12V power supply. To use the 4-pin ATX power
supply, please plug your power supply along with Pin 1 and Pin 5.
8 5
4 1