Medion 3500 Getting Started page 19

Fan Power Connectors: C_FAN1
The C_FAN1 (processor fan) supports system cooling fan with +12V. It
supports three-pin head connector. When connecting the wire to the
connectors, always take note that the red wire is the positive and should be
connected to the +12V, the black wire is Ground and should be connected to
GND. If the mainboard has a System Hardware Monitor chipset on-board, you
must use a specially designed fan with speed sensor to take advantage of the
CPU fan control.
Note:
1. Always consult the vendor for proper CPU cooling fan.
2. CPU Fan supports the fan control. You can install the PC Alert
utility that will automatically control the CPU Fan speed accord-
ing to the actual CPU temperature.
Hardware Setup
SENSOR
+12V
GND
C_FAN1
2-15