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Removing Or Installing An Expansion Card - HP ProDesk 400 G1 Microtower Hardware Reference Manual

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Removing or installing an expansion card

The computer has three PCI Express x1 expansion slots and one PCI Express x16 expansion slot.
You can install a PCI Express x1, x8, or x16 expansion card in the PCI Express x16 slot.
For dual graphics card configurations, the first (primary) card must be installed in the PCI Express
x16 slot.
To remove, replace, or add an expansion card:
Remove/disengage any security devices that prohibit opening the computer.
Remove all removable media, such as compact discs or USB flash drives, from the computer.
Turn off the computer properly through the operating system, then turn off any external devices.
Disconnect the power cord from the power outlet and disconnect any external devices.
as long as the system is plugged into an active AC outlet. You must disconnect the power cord
to avoid damage to the internal components of the computer.
Remove the computer access panel.
Remove the screw that holds down the expansion card retention latch (1) then slide the latch up
(2) and pull it off the rear of the chassis (3).
Locate the correct vacant expansion socket on the system board and the corresponding
expansion slot on the back of the computer chassis.
Chapter 2 Hardware upgrades
Regardless of the power-on state, voltage is always present on the system board


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