4. Run the system diagnostics to verify that the new processor operates correctly.
Related tasks
Removing the cooling shroud
on page 65
Installing the processor
on page 108
Installing the cooling shroud
on page 66
Power supply units
Redundant AC power supply unit
Your system supports up to two 495 W (Platinum) AC power supply units (PSUs).
NOTE:
When two identical PSUs 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 PSUs
when Hot Spare is disabled. When Hot Spare is enabled, one of the PSUs will be put into standby when system
utilization is low in order to maximize efficiency.
CAUTION:
If two PSUs are used, they must be of 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 servers can result in a power supply mismatch condition or failure to power on.
Hot spare feature
Your system supports the hot spare feature that significantly reduces the power overhead associated with power supply unit (PSU)
redundancy.
When the hot spare feature is enabled, one of the redundant PSUs is switched to the 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 PSUs active is more efficient than having one PSU in the sleep state, the active PSU can also activate the 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 falls below 20 percent, then the redundant PSU is switched to the sleep state.
You can configure the hot spare feature by using the iDRAC settings. For more information about iDRAC settings, see the
Integrated Dell
Remote Access Controller User’s Guide
available at
Dell.com/idracmanuals
.
Removing a redundant AC power supply unit
Prerequisites
CAUTION:
Many repairs may only be done by a certified service technician. You should only perform troubleshooting and
simple repairs as authorized in your product documentation, or as directed by the online or telephone service and
support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow
the safety instructions that are shipped with your product.
CAUTION:
The system requires one power supply unit (PSU) for normal operation. On power-redundant systems,
remove and replace only one power supply at a time in a system that is powered on.
1. Follow the safety guidelines listed in the Safety instructions section.
2. Disconnect the power cable from the power source and from the PSU you intend to remove and remove the cables from the strap.
NOTE:
You may have to unlatch and lift the optional cable management arm if it interferes with PSU removal. For
information about the cable management arm, see the system’s rack documentation.
112
Installing and removing system components
Summary of Contents for E35S001
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