When choosing the correct power supply to buy, the first thing you should do is identify the components you need and plan to add. Thinking about your PC's purpose (gaming, work, etc.) can help you determine the list of components you will need for your PC build. If you need a hand with choosing the right components, the easiest way to configure your own PC is to use our custom PC builder. · Consider these key components: · Central Processing Unit (CPU): Selecting a CPU is similar to choosing the make and model of a car. For example, our PSU calculator allows you to pick a brand (Intel or AMD)

While highly accurate, it's recommended to add a 10-20% buffer to the calculated wattage for safety and future upgrades. For best results, input as much detail as possible, but the PSU calculator tool can estimate based on common setups if specifics aren't known. After calculating your needs, Newegg’s power supply calculator will suggest compatible power supplies, but the final choice depends on your preferences and requirements.

You should test all of them. So check the SATA plug, the molex plug, the A TX plug, the video power card, and whatever other plugs you have on your power supply. All of those plugs should be working if your power supply is functional.