ASROCK G41M-S3 User Manual page 23

ATX Power Connector
(24-pin ATXPWR1)
(see p.10 No. 6)
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 Connector
(4-pin ATX12V1)
(see p.10 No. 27)
Please connect an ATX power
12 24
supply to this connector.
1 13
20-Pin ATX Power Supply Installation
Please note that it is necessary
to connect a power supply with
ATX 12V plug to this connector
so that it can provides sufficient
power. Failing to do so will cause
the failure to power up.
12 24
1 13
2 3 2 3 2 3
2 3 2 3