Tyan Computer B2735 user manual Replacing the cooling fans

3.8Replacing the cooling fans

6.Remove the four screws securing each fan to the fan bracket to remove them from the fan bracket.

Note: The Transport GX21 (B2735) uses two different types of cooling fans which operate at different speeds. The two fans installed nearest the power supply have a peak speed of 15,000 rpm. The remaining 3 fans have a peak speed of 11,500 rpm. The two fans nearest the power supply should be connected to the speed-controllable pin headers (CPU1_FAN and CPU2_FAN) on the mother board. See 3.8.1 Cooling fan con- nections.

58 Chapter 3: Replacing pre-installed components