Corsair 750D - Installing the Power Supply (PSU); Installing PCI-E;PCI Cards

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> Remove thumbscrews and corresponding slot cover(s).
> Install the add-on card and secure with thumbscrews.
Installing the PCI-E/PCI cardsInstalling the power supply (PSU)
> Seat the PSU on the bottom of the case.
> Align holes and secure the PSU with screws.
Note: PSU can be installed in either fan up or fan down orientations.