Power Supply Units; Hot Spare Feature - Dell XC430 Owner's Manual

NOTE: The thermal-grease is intended for one-time use only. Dispose of the syringe after
you use it.
c. Place the heat sink onto the processor.
d. Tighten the four screws to secure the heat sink to the system board.
NOTE: Tighten the screws diagonally opposite to each other. Do not over-tighten the heat
sink retention screws when installing the heat sink. To prevent over-tightening, tighten the
retention screw until resistance is felt, and stop once the screw is seated. The screw tension
should be no more than 6 in-lb (6.9 kg-cm).
Next steps
1. Install the cooling shroud.
2. Follow the procedure listed in
3. While booting, press F2 to enter the System Setup page and check that the processor information
matches the new system configuration.
4. Run the system diagnostics to verify that the new processor operates correctly.

Power supply units

Your system supports the following power supply units (PSU):
• 550 W AC (redundant)
When two identical PSUs are installed, the power supply configuration is redundant (1 + 1). In redundant
mode, power is supplied to the system equally from both PSUs to maximize efficiency.
NOTE: The PSUs must be of the same type and have the same maximum output power.
NOTE: For AC PSUs, use only PSUs with the Extended Power Performance (EPP) label on the back.
Mixing PSUs from previous generations of Dell PowerEdge servers can result in a PSU mismatch
condition or failure to turn on.

Hot Spare feature

Your system supports the Hot Spare feature that significantly reduces the power overhead associated
with PSU redundancy.
When the Hot Spare feature is enabled, one of the redundant power supplies is switched to a sleep state.
The active PSU supports 100 percent of the load, thus operating at higher efficiency. The PSU in the sleep
state monitors output voltage of the active PSU. If the output voltage of the active PSU drops, the PSU in
the sleep state returns to an active output state.
If having both power supplies active is more efficient than having one PSU in a sleep state, the active PSU
can also activate a sleeping PSU.
The default PSU settings are as follows:
• If the load on the active PSU is more than 50 percent, then the redundant PSU is switched to the
active state.
• If the load on the active PSU is less than 20 percent, then the redundant PSU is switched to the sleep
state
After working inside your system.
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