Beeping, whirring life.

carefully place) the mobo into the waiting chassis.

Then, remove both side panels from your PC case by loosening any thumbscrews or latches.

A Corsair RM850X PSU in front of an opened PC.

Step 2:With the PSU fan-side down, slide it into the cases PSU bay.

Either way, secure the PSU in place with the flat-topped screws that came with the case.

See the currently empty motherboard tray?

Cover image for YouTube video

What PSU do I need?

Most importantly, your PSU should fit your case.

Check your cases specs if youre not sure.

A PSU fully installed inside a gaming PC.

Youll also see PSU possess ratings like 80 Plus Bronze, 80 Plus Gold and 80 Plus Platinum.

These basically rate how efficiently a PSU can turn wall power into PC power.

Honestly, Bronze-rated PSUs are fine for budget builds, but Gold is a better middle ground.

A  modular PC PSU, out of its case, with several cables connected to it.

Lastly, you could take your pick of modular, semi-modular and fixed PSUs.

Semi-modular PSUs have both a few fixed cables and a few sockets for removable cables.

A close-up of the CPU power connectors on the edge of a motherboard.

The Razer Katana PSU on a plain dark background.