Technical Reference
49

Table 18. Rear Chassis Fan Connector

Pin Signal Name
1 Control
2 +12 V
3 REAR_TACH_OUT
# INTEGRATOR’S NOTES
• Use only ATX12V-, SFX12V-, or TFX12V-compliant power supplies with the Desktop Board D865PCD. ATX12V, SFX12V, and TFX12V power supplies have an additional power lead that provides required supplemental power for the processor. Always connect the 20-pin and 4-pin leads of ATX12V, SFX12V, and TFX12V power supplies to the corresponding connectors on the desktop board, otherwise the board will not boot. • Do not use a standard ATX power supply. The board will not boot with a standard ATX power supply.

Table 19. ATX12V Power Connector

Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 +12 V 4 +12 V

Table 20. Processor Fan Connector

Pin Signal Name
1 Control
2 +12 V
3 CPU_FAN_TACH

Table 21. Main Power Connector

Pin Signal Name Pin Signal Name
1 +3.3 V 11 +3.3 V
2 +3.3 V 12 -12 V
3 Ground 13 Ground
4 +5 V 14 PS-ON# (power supply remote on/off)
5 Ground 15 Ground
6 +5 V 16 Ground
7 Ground 17 Ground
8 PWRGD (Power Good) 18 No connect
9 +5 V (Standby) 19 +5 V
10 +12 V 20 +5 V