In my last post about building a budget starter gaming computer I included a 650 Watt Power Supply in the preferred build option as it would be able to support high-end CPUs as well as the latest NVidia GeForce Graphics Cards. There were some questions in some forums related to what power supply to use in the system, so I thought I would have another look around and see what I could find about it.

During my looking around I found that for a RTX 3080, which uses a maximum 320 Watts, it will run well even on 600 Watt Power Supply. Since the RTX 3090 uses a maximum 350 Watts, it should run well with a 650 Watt Power Supply. The RTX 3070 will draw 220 Watts, so that should easily work with a 650 Watt PSU.

Both of the rated power usages for the RTX 3080 and the RTX 3090 come from the NVidia web-site and are for the Founder Edition cards. It is possible that some of the graphics cards from other manufacturers will require more power.

The team over at Optimum Tech did a great video testing different power supplies …