ASROCK A780GXE/128M User Manual page 37

This Manual: http://www.manuallib.com/file/2588059
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.13 No. 3)
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.13 No. 39)
SLI/XFIRE_POWER1
IEEE 1394 Header
(9-pin FRONT_1394)
(see p.13 No. 26)
1
Serial port Header
(9-pin COM1)
(see p.13 No.28)
1
20-Pin ATX Power Supply Installation
Please note that it is necessary
4 8 to connect a power supply with
ATX 12V plug to this connector.
1 6
Failing to do so will cause power
up failure.
4-Pin ATX 12V Power Supply Installation
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 at
the same time.
Besides one default IEEE 1394
RXTPAM_0
GND
port on the I/O panel, there is one
RXTPBM_0
+12V
GND
IEEE 1394 header
(FRONT_1394) on this
+12V
motherboard. This IEEE 1394
RXTPBP_0
GND
RXTPAP_0
header can support one IEEE
1394 port.
This COM1 header supports a
RRXD1
DDTR#1
serial port module.
DDSR#1
CCTS#1
RRI#1
RRTS#1
GND
TTXD1
DDCD#1
3 6 3 6 3 6 3 6 3 6
12 24
1 13
4 8
1 6