3 Things to Know About the Dell XPS 8940 Power Supply
It uses a standard ATX power supply The Dell XPS 8940 accepts a standard ATX power supply, making it easy to swap in a higher-wattage unit.
The motherboard connector is proprietary Dell uses a non-standard motherboard power connector, so you will need an adapter if you install a non-Dell PSU.
It is still better than most prebuilts Despite the adapter requirement, the XPS 8940 is refreshingly upgrade-friendly compared to other prebuilt PCs that use entirely proprietary power supplies.