Dell PowerEdge C4140 EMC Installation and Service Manual - Page 123

Installing the NVLink Air Shroud, Power supply units - technical guide

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7. Following the same diagonal pattern, tighten the remaining screws. Next steps 1. Install the NVLink air shroud. Installing the NVLink Air Shroud Prerequisites 1. Follow the safety guidelines listed in the Safety instructions section. 2. Follow the procedure listed in Before working inside your system. Steps 1. Align the guide slots on the NVLink air shroud with the screws on the graphics heat sink. 2. Lower the NVLink air shroud into the NVLink board until it is firmly seated. Figure 96. Installing a NVLink air shroud Power supply units Your system supports two 2400 W or 2000 W AC PSUs or two PSUs (one is supported if the optional SATA drive cage is installed) NOTE: For more information, see the Technical specifications section. CAUTION: If two PSUs are installed, both the PSUs must have the same type of label. For example, Extended Power Performance (EPP) label. Mixing PSUs from previous generations of PowerEdge servers is not supported, even if the PSUs have the same power rating. Mixing PSUs will result in mismatch condition or failure to turn the system on. NOTE: When two identical PSUs are installed, power supply redundancy (1+1 - with 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 is put into the sleep mode when system utilization is low in order to maximize efficiency. PowerEdge C4140 installing and removing system components 123

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7.
Following the same diagonal pattern, tighten the remaining screws.
Next steps
1.
Install the NVLink air shroud
.
Installing the NVLink Air Shroud
Prerequisites
1.
Follow the safety guidelines listed in the
Safety instructions
section.
2.
Follow the procedure listed in
Before working inside your system
.
Steps
1.
Align the guide slots on the NVLink air shroud with the screws on the graphics heat sink.
2.
Lower the NVLink air shroud into the NVLink board until it is firmly seated.
Figure 96. Installing a NVLink air shroud
Power supply units
Your system supports two 2400 W or 2000 W AC PSUs or two PSUs (one is supported if the optional SATA drive cage is installed)
NOTE:
For more information, see the
Technical specifications
section.
CAUTION:
If two PSUs are installed, both the PSUs must have the same type of label. For example, Extended Power
Performance (EPP) label. Mixing PSUs from previous generations of PowerEdge servers is not supported, even if the
PSUs have the same power rating. Mixing PSUs will result in mismatch condition or failure to turn the system on.
NOTE:
When two identical PSUs are installed, power supply redundancy (1+1 – with 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 is put into the sleep mode when system utilization is low in order to
maximize efficiency.
PowerEdge C4140 installing and removing system components
123