ASROCK N100M User Manual page 32

ATX Power Connector
(24-pin ATXPWR1) (see p.6, No. 6)
This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX
power supply, please plug it along Pin 1 and Pin 13.
ATXPWR1
12 24
1 13
N100M
29