Asus Z8PH-D12/IFB - Manual (Page 46)

2-28 Chapter 2: Hardware information
4. Front fan connectors
(4-pin FRNT_FAN1, FRNT_FAN2, FRNT_FAN3, FRNT_FAN4)
The fan connectors support cooling fans of 350 mA–740 mA (8.88 W max.)
or a total of 3.15 A–6.66 A (53.28 W max.) at +12V. Connect the fan cables to
the fan connectors on the motherboard, ensuring that the black wire of each
cable matches the ground pin of the connector.
• DO NOT forget to connect the fan cables to the fan connectors. Insufficient
air flow inside the system may damage the motherboard components.
• These are not jumpers! DO NOT place jumper caps on the fan connectors!
• All fans feature the ASUS Smart Fan technology.