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3. thermal-grease syringe
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 After working inside your system.
3. While booting, press <F2> to enter the System Setup and check that the processor information
matches the new system configuration.
4. Run the system diagnostics to verify that the new processor operates correctly.
Related Links
Removing the cooling shroud
Installing the cooling shroud
Removing a processor
Redundant AC power supply
Your system supports either:
• Two 495 W, 750 W, or 1100 W (Platinum) AC power supply modules or
• Two 450 W (Bronze) AC power supply modules or
NOTE: When two identical power supply units are installed, power supply redundancy (1+1 – with
redundancy or 2+0 – without redundancy) is configured in system BIOS. In redundant mode, power
is supplied to the system equally from both power supply units when Hot Spare is disabled. When
Hot Spare is enabled, one of the power supply units will be put into standby when system utilization
is low in order to maximize efficiency.
CAUTION: If two power supplies are used, they must be of the same maximum output power.
NOTE: For AC power supplies, use only power supplies with the Extended Power Performance (EPP)
label on the back. Mixing PSUs from previous generations of servers can result in a power supply
mismatch condition or failure to power on.
NOTE: When you have more than two GPU cards on your system, you will need two 1100 W power
supply units installed on your system.
Hot Spare feature
Your system supports the Hot Spare feature that significantly reduces the power overhead associated
with power supply redundancy.
When the Hot Spare feature is enabled, one of the redundant power supplies is switched to a sleep state.
The active power supply supports 100% of the load, thus operating at higher efficiency. The power supply
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