Computer Power Supplies

Add the TDP or estimated power draw of your CPU and GPU, plus drives, fans, and peripherals, then add a 20–30% margin for efficiency and future upgrades; for most single-GPU gaming or workstation builds this falls between 450 W and 850 W, while high-end multi-GPU or server builds may require 1000 W or more

Choose an 80 Plus Bronze or higher for consumer builds; Gold offers noticeably better efficiency under typical loads, Silver is a middle ground, and Platinum/Titanium give incremental savings mainly beneficial for high-hour or high-power systems

Modular PSUs let you attach only the cables you need for cleaner builds and better airflow, semi-modular keeps essential cables fixed while allowing extras to be removed, and non-modular units have all cables fixed and are usually more economical

Protections such as Over Voltage Protection (OVP), Over Current Protection (OCP), Over Power Protection (OPP), and Short Circuit Protection (SCP) are important safety features that help prevent component damage and are recommended for reliable operation

Verify the PSU form factor (ATX, SFX, etc.) fits your case, ensure it provides the correct motherboard 24-pin and CPU 4/8-pin connectors, and confirm there are enough PCIe connectors for your GPU(s) plus adequate SATA/Molex connectors for drives and accessories

A quality power supply typically lasts 5–10 years depending on load and environment; longer manufacturer warranties (5–10 years) generally indicate higher confidence in component quality and can be helpful for long-term builds

Look for units with efficient designs, larger low-RPM fans, or hybrid/fanless modes for lower noise; ensure the PSU's fan orientation and exhaust path match your case airflow to avoid hotspots