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header.how_we_evaluate — How we test and recommend PSUs

Updated June 4, 2026

At WhatPSU, operated by Aetherix Web LTD, our goal is to provide clear, practical PSU recommendations backed by consistent evaluation. Below is a high-level summary of how we assess power supply requirements and product suitability without revealing proprietary ranking logic.

Data sources

We rely on publicly available, reputable sources and first-party documentation, including:

  • CPU/GPU vendor datasheets and product pages (TDP/TGP, connectors, platform notes)
  • Standards bodies and specifications (ATX 3.0/PCIe 5.0 guidelines)
  • Community-validated databases and technical reviews for context on real-world draw
  • Retailer and manufacturer listings for model availability and configuration details

What inputs we consider

  • Declared CPU/GPU models and their typical/peak power characteristics
  • System configuration factors (storage, cooling, peripherals) and common overhead
  • Form-factor and connector needs (ATX 3.0/PCIe 5.0, EPS, PCIe plugs)
  • Regional availability and retailer data (to find realistic options)

Evaluation criteria

For the PSU pick itself, we evaluate candidates by:

  • Headroom for transient spikes and aging relative to computed system load
  • Connector readiness (12VHPWR, EPS, PCIe 6+2) for the selected parts
  • Quality signals: OEM/platform lineage, protections (OCP/OVP/OTP/OPP/SCP), warranty
  • Efficiency claims (80 PLUS/Cybenetics) by series and model family

How we translate inputs into recommendations

  • A baseline system draw derived from component characteristics and publicly available references
  • A resilience buffer to cover transient spikes, aging, and light upgrades
  • Mapping to PSU wattage classes that safely accommodate the computed budget
  • Filtering for quality signals (platform reputation, certifications, protections) and connectors

Update cadence

We review important pages regularly and additionally when any of the following occur:

  • Major GPU/CPU launches or driver changes materially affecting power behavior
  • Standards updates (e.g., ATX revisions, connector changes)
  • Significant PSU model releases or discontinuations

Editorial standards

  • Recommendations are reviewed by our editorial team before publication
  • We correct inaccuracies promptly—see our Corrections & Fact-checking page
  • Affiliate links never influence our safety thresholds or inclusion criteria; see Affiliate Disclosure

Why we don’t publish the exact algorithm

Our matching and ranking logic is proprietary and a core part of our business. The framework above describes the principles we follow to keep results safe, current, and practical, while preserving the details that make WhatPSU valuable.

Have suggestions or spotted an issue? Contact us—we’re listening.