Siig Transport GX21 B5350 User Manual

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3.7  Replacing the cooling fans
38
Chapter 3: Replacing installed components
6. Remove the four screws securing each fan to the fan 
bracket to remove them from the fan bracket.
Note:  
The Transport GX21 (B5350) uses 
two different types of cooling fans which 
operate at different speeds. The fan installed 
nearest the power supply has a peak speed 
of 15,000 rpm. The other 4 fans have a peak 
speed of 15,500 rpm. The fan nearest the 
power supply should be connected to the 
speed-controllable pin header (CPU1_FAN) 
on the mother board.