User`s guide
Chapter 5: Advanced Serverboard Setup
5-29
Fan Headers
The R422-E2/R422-INF-E2 has four chassis/system
fan headers (Fan1 to Fan4) on the motherboard. All
these 4-pin fans headers are backward compatible
with the traditional 3-pin fans. 3-pin fans do not sup-
port fan speed control. However, fan speed control is
available for 4-pin fans. The fan speeds are controlled
by Thermal Management via Hardware Monitoring in
the Advanced Setting in the BIOS. (The Default set-
ting is Disabled.) See the table on the right for pin
denitions.
FanHeaderPinDenitions
Pin# Denition
1 Ground
2 +12V
3 Tachometer
4 PWR Modulation
A: Fan1
B: Fan2
C: Fan3
D: Fan4