: If you are buying a high-end GPU like the RTX 40-series, look for ATX 3.0 compliant units. These include the native 12VHPWR cable, which handles sudden power spikes better than older adapters.

A PSU is the most critical safety component in your PC. Avoid "no-name" brands that may lack vital safety features like over-voltage or thermal safeguards.

: Look for units from Seasonic , Corsair , Antec, Silverstone, EVGA, or XFX.

To buy a Power Supply Unit (PSU) that ensures system stability and longevity, you must balance raw power with efficiency and physical compatibility. 1. Calculate Your Wattage Needs

: Aim for a PSU with a wattage roughly 1.5x to 2x your calculated total. For instance, a gaming rig drawing 400W should ideally use a 650W–750W unit to stay within the peak efficiency curve.