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.
ATX Power Connector
(24-pin ATXPWR1)
(see p.2, No. 9)
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
(4-pin ATX12V1)
(see p.2, No. 19)
24
13
12
1
20-Pin ATX Power Supply Installation
ASRock B75M-ITX Motherboard
Pin 1-3 Connected
3-Pin Fan Installation
Please connect an ATX power
supply to this connector.
24
12
Please connect an ATX 12V
power supply to this connector.
13
1
27