ASROCK X79 Extreme3 Quick Installation Manual page 36

ATX Power Connector
(24-pin ATXPWR1)
(see p.2 No. 8)
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.
ATX 12V Power Connector
(8-pin ATX12V1)
(see p.2 No. 1)
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.
SLI/XFIRE Power Connector
(4-pin SLI/XFIRE_PWR1)
(see p.2 No. 38)
Serial port Header
(9-pin COM1)
(see p.2 No. 29)
36
12 24
1 13
20-Pin ATX Power Supply Installation
5 1
8 4
4-Pin ATX 12V Power Supply Installation
SLI/XFIRE_POWER1
ASRock X79 Extreme3 Motherboard
Please connect an ATX power
supply to this connector.
12
1
Please connect an ATX 12V
power supply to this connector.
5
8
It is not necessary to use this
connector, but please connect it
with a hard disk power
connecor when two graphics
cards are plugged to this
motherboard.
This COM1 header supports a
serial port module.
24
13
1
4