How To Choose Computer Power Supply Wattage

Manually calculating this requires that you multiply the total amps of all components by the total volts of all components.

How to choose computer power supply wattage. Choosing the more efficient power supply will save some cash on your monthly power bill. Manufacturers usually list their power supplies output in watts. What power supply do i need. Picking the perfect power supply for your computer isn t that simple but with this guide you ll be way ahead of the competition.

In order to protect your computer against power supply interruptions you need a battery backup. A power supply that s only 70 efficient on the other hand will pull 428 watts of power from the wall. This tool will help you select a suitable power supply unit for your system. Use outervision s power supply calculator.

Ups units are like power strips that contain a big battery inside providing a buffer against power supply interruptions. Inefficient delivery leads to wasted power and more heat which can potentially decrease the lifespan of your components. Wattage is certainly an important consideration when choosing a desktop power supply but so is psu efficiency. Desktop power supplies have a power output rating of from 200 watts to 1800 watts for.

The result is the total watts that your pc build requires. To answer this question outervision psu calculator analyzes dozens of power supplies per each certification category compares their efficiency unit price computer power consumption overall pc energy cost and payback period. Find power draw benchmarks from sites like tom s hardware on the components in your system mainly you re gpu and cpu and add them together to give you a minimum wattage rating. If you use a power supply with an 85 efficiency rating your pc will pull about 353 watts of input power from your power company.

This buffer can range from a few minutes to an hour or more depending on the size of the unit. For example if a power supply draws 647 watts from the wall but provides 550 watts of power to your pc components that s an efficiency of about 85 percent which would equate to 80 plus silver.