User's Manual
Chapter 4: Motherboard information4-8
3. USB connector (10-1 pin USB34, USB56; A-Type USB7)
These connectors are for USB 2.0 ports. Connect the USB module cables
to connectors USB34, then install the modules to a slot opening at the
back of the system chassis. These USB connectors comply with USB 2.0
specication that supports up to 480 Mbps connection speed.
4. CPU, front and rear fan connectors
(4-pin CPU_FAN1, FRNT_FAN1, FRNT_FAN2, FRNT_FAN3, REAR_FAN1)
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.
P8B-X/MR USB 2.0 connectors
P8B-X/MR
P8B-X/MR
P8B-X/MR FAN connectors
• DO NOT forget to connect the fan cables to the fan connectors. Insufcient
air ow 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.