How to Choose the Right Power Supply (PSU) Efficiency & Cable Types

Selecting the proper power supply unit (PSU) is critical for system longevity and component protection. When choosing a PSU, pay attention to these three core factors: 1) 80 Plus Efficiency Rating: 80 Plus Bronze (85% efficiency), Gold (90% efficiency), and Platinum (92%+ efficiency). Higher efficiency ratings mean less energy wasted as excess heat and lower electric bills. 2) Cable Modularities: Non-modular power supplies have all cables permanently attached, leading to severe cable clutter. Semi-modular supplies keep essential 24-pin and CPU cables attached while allowing optional SATA/PCIe cables. Fully modular supplies let you detach every cable, drastically simplifying custom building and sleeve cable upgrades. 3) ATX 3.0 Standard & 12V-2x6 Connectors: If you plan to run modern Nvidia RTX 40 series GPUs, choose an ATX 3.0 certified PSU with native 12V-2x6 power delivery to withstand transient power spikes up to 200% of rated capacity safely.