Power Supplies

Power Supplies covers PSU selection by wattage, efficiency rating, and budget, the component most builders underspend on despite it protecting every other part in the system from instability or damage. The central question is almost always wattage: how to calculate actual system draw rather than guess, and how much headroom above that calculated number is worth paying for as insurance against transient spikes from the GPU and future upgrades. Efficiency certification, the 80+ tiers from Bronze through Titanium, affects running cost and heat output more than raw wattage does, since a higher-efficiency unit wastes less power as heat at the same load, which matters for both electricity cost and case temperature over time. Modularity is a secondary but real factor for cable management and airflow, letting builders skip unused cables entirely rather than tucking them out of the way. Buyers should be wary of unbranded or unreviewed PSUs regardless of advertised wattage, since a poorly built unit can fail in ways that damage connected components, unlike a failure in almost any other part of the system. Start with an accurate wattage calculation for the specific CPU and GPU combination, then add headroom before comparing efficiency tiers and price. PSU Wattage Calculator Guide covers the sizing math directly, and Best Power Supply For Gaming Pc rounds up current recommended units.