Dell D27M User Manual

4 Disconnect the power cables from the hard disks.
NOTE: For computers with graphics card, that has power cable
connected, disconnect the power cable from the graphics card.
5 Remove the four screws (6-32UNCx6.3) that secure the power-supply unit to
the chassis.
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Dell D27M Specifications

General

Brand	Dell
Model	D27M
Category	Desktop
Language	English