EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply

The EVGA 550 B5 is a fully modular ATX power supply rated at 550W continuous output with 80 PLUS Bronze certification — meaning it delivers a verified efficiency floor of 82–85% across its load range, peaking at 89% under typical conditions. That efficiency rating directly reduces heat rejection inside the chassis; less thermal load means lower ambient temperatures for all downstream components. The unit runs a 135mm fluid-dynamic bearing fan in semi-passive ECO mode, which cuts fan noise entirely at low and medium draw levels. Six independent protection circuits (OVP, UVP, OCP, OPP, SCP, OTP) cover the full spectrum of overstress conditions, and 100% Japanese capacitors underpin the voltage regulation quality — a specification point that distinguishes it from budget units using mixed or unspecified cap sourcing.

The B5 550W occupies the entry point of the "competent mid-range PSU" category — appropriate for mainstream gaming builds centered on a current-generation mid-tier GPU and a 6–8 core processor. It is the right choice when the goal is clean, quiet power delivery without overspending on Gold or Platinum efficiency for a system that won't run 24/7. The fully modular design makes it particularly well-suited for compact mid-tower or mATX cases where cable management headroom is limited. The 5-year warranty provides meaningful coverage relative to the component's expected lifecycle in a typical consumer build.