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EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply — main product image
EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply
EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply
EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply
EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply
EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply
EVGA 220-B5-0550-V1 550W B5 80+ Bronze Modular Power Supply
EVGA

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

★★★★★4.7 (852 reviews)
550W80 PLUS Bronze

89% efficiency and zero fan noise at idle — the EVGA B5 550W delivers clean, modular power without wasting watts or generating unnecessary noise.

$79.99*$89.99Save 11%
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

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.

Key Features

80 PLUS Bronze certified, with 89% efficiency or higher under typical loads

Fully Modular to reduce clutter and improve airflow

EVGA ECO Intelligent Thermal Control System eliminates fan noise at low to medium loads

5 Year and unparalleled EVGA Customer Support

Heavy-duty protections, including OVP, UVP, OCP, OPP, SCP, and OTP

Specifications

Brand
EVGA
Model
220-B5-0550-V1
Wattage
550W
Efficiency Certification
80 PLUS Bronze (up to 89% efficiency)
Modularity
Fully Modular
Fan Size
135mm
Fan Bearing Type
Fluid-Dynamic Bearing
Fan Control
EVGA ECO Semi-Passive Mode
Capacitors
100% Japanese
Protections
OVP, UVP, OCP, OPP, SCP, OTP
Warranty
5 Years

Pros & Cons

👍 Pros

  • 80 PLUS Bronze certification confirms up to 89% efficiency under typical loads, reducing wasted heat output and lowering electricity cost over thousands of runtime hours.
  • Fully modular cable design allows unused connectors to be stored outside the case entirely, reducing cable clutter and improving chassis airflow without cable management compromises.
  • ECO semi-passive fan mode delivers zero fan noise at low-to-medium loads — a measurable acoustic benefit for office and living-room builds.
  • 135mm fluid-dynamic bearing fan provides a longer rated lifespan than sleeve-bearing alternatives, reducing the likelihood of fan failure triggering thermal shutdowns.
  • Six-layer protection suite (OVP, UVP, OCP, OPP, SCP, OTP) guards all major failure vectors — critical for protecting downstream GPU and CPU investment.

👎 Cons

  • Bronze efficiency tier trails Gold and Platinum units by roughly 4–8% at 50% load — over three to five years of runtime the efficiency gap compounds into a real cost difference for always-on systems.
  • 550W ceiling is sufficient for a single-GPU mid-range build but becomes constrained when pairing a high-TDP CPU (e.g., Intel Core i9 or Ryzen 9) with a flagship GPU (RTX 4090, RX 7900 XTX) — those combinations should look at 750W or above.
  • Single 12V rail architecture, while simplified for compatibility, provides less granular overcurrent protection per device compared to multi-rail designs.
  • No modular cable upgrade path — if the included cable lengths don't suit an extended full-tower build, aftermarket B5-compatible cables must be sourced separately.

Frequently Asked Questions

80 PLUS Bronze requires at least 82% efficiency at 20% load, 85% at 50% load, and 82% at 100% load. The EVGA B5 550W exceeds that with up to 89% efficiency under typical loads. In practice, a system drawing 300W from the wall under Bronze certification wastes roughly 45W as heat versus roughly 30W for a Gold unit — meaningful over thousands of hours of runtime.
EVGA's ECO Intelligent Thermal Control system runs the 135mm fluid-dynamic bearing fan in a semi-passive mode — the fan stops completely at low-to-medium loads (typically below 40–50% rated output). This means the PSU is silent during web browsing, light office tasks, or idle. The fan spins up automatically under sustained high load to maintain safe operating temperatures.
Yes for most configurations. A system with a Ryzen 5 or Core i5 paired with an RTX 3060 or RX 6700 typically draws 250–350W peak at the wall. The 550W headroom provides roughly 200W of margin above peak load, which is within the recommended 20–30% overhead for PSU longevity and efficiency.
The unit ships with OVP (over-voltage), UVP (under-voltage), OCP (over-current), OPP (over-power), SCP (short-circuit), and OTP (over-temperature) protection. These cover the primary failure modes — an unprotected PSU failure can cascade into motherboard or GPU damage, so this suite is the correct baseline for any build.
As a fully modular unit, all cables are detachable — only connect what your build requires. Typical included cables cover 24-pin ATX, EPS 4+4 CPU, PCIe 6+2 GPU, SATA, and Molex connectors. The modular design means unused cables stay out of the chassis entirely, benefiting airflow in compact builds.

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