
Most PSUs will have at least one cable that is compatible with either an 8-pin or a 6-pin connector. So make sure your PSU has enough cable to support that. It’ll be either 6, 8, 6+6, 6+8, or 8+8-pins – and that's per GPU.

Graphics Processing Unit (GPU) – You will need to account for the actual power draw and the number of additional power pins a GPU may have.Central Processing Unit (CPU) – Be sure you know the make, model or series, and socket size.This is a critical component of your calculations because almost everything within your build plugs into and derives power from the motherboard. Motherboard – Be sure you know what kind of motherboard (Desktop, Server, Laptop, etc.) your build currently has or what form factor you want to put in your new build.Here’s a complete list of items that you need to consider when calculating your power supply needs.

Before you decide what power supply to buy, it is crucial that you know all the components that you currently have within your build or the ones that you would like to include.
