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Chapter 2: Hardware information
4. CPU and system fan connectors (3-pin CPUFAN, SYSTEMFAN)
The fan connectors support a CPU fan (750mA) and a system fan
(500mA) at +12V. Orient the fans so that the heat sink fins allow air
flow to go across the onboard heat sinks instead of the expansion
slots. The fan wiring and plug may vary depending on the fan
manufacturer. Connect the fan cable to the connector matching the
black wire to the ground pin.
Figure 2-32 CPU and System Fan Connectors
Do not forget to connect the fan cables to the fan connectors. Lack of
sufficient air flow within the system may damage the motherboard
components. These are not jumpers! DO NOT place jumper caps on
the fan connectors!
3. Floppy disk drive connector (34-1 pin FLOPPY)
This connector supports the provided floppy drive ribbon cable. After
connecting one end to the motherboard, connect the other end to the
floppy drive. (Pin 5 is removed to prevent incorrect insertion when
using ribbon cables with pin 5 plug).
Figure 2-31 Floppy Disk Drive Connector
®
P4B-M
P4B-M 12V Fan Connectors
CPUFAN
GND
Rotation
+12V
SYSTEMFAN
GND
Rotation
+12V
®
P4B-M
NOTE: Orient the red markings on
the floppy ribbon cable to PIN 1.
P4B-M Floppy Disk Drive Connector
PIN 1
FLOPPY