Dell PowerEdge R740xd - Replacing Optional Internal USB Memory Key; Power Supply Units

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Replacing optional internal USB memory key

Prerequisites

CAUTION: To avoid interference with other components in the server, the maximum permissible dimensions of the USB memory

key are 15.9 mm wide x 57.15 mm long x 7.9 mm high.

1 Follow the safety guidelines listed in Safety instructions.

2 Follow the procedure listed in Before working inside your system.

Steps

1 Locate the USB port or USB memory key on the system board.

To locate the USB port, see the Internal USB memory key (optional) section.

2 If installed, remove the USB memory key from the USB port.

3 Insert the replacement USB memory key into the USB port.

Next steps

1 Follow the procedure listed in After working inside your system.

2 While booting, press F2 to enter System Setup and verify that the system detects the USB memory key.

Related link

Internal USB memory key (optional)

Power supply units

The power supply unit (PSU) is an internal hardware component which supplies power to the components in the system.

Your system supports one of the following:

• Two 2400 W, 2000 W, 1600 W, 1100 W, 750 W, or 495 W AC PSUs

• Two 1100 W DC PSUs

• Two 1100 W or 750 W Mixed Mode HVDC PSUs

NOTE

: For more information, see the Technical specications

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: Titanium PSU is nominally rated for 200 V AC to 240 V AC input only.

NOTE: When two identical PSUs are installed, power supply redundancy (1+1 – with redundancy or 2+0 – without redundancy) is

congured 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 eciency.

NOTE: If two PSUs are used, they must be of the same maximum output power.

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