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PSU Tier List

PC power supply units ranked by quality tier, from S (excellent) to D (avoid). Based on component quality, reliability testing, and independent reviews.

BrandModelWattageCert.ModularTierPrice CADBuy
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Tier S: ExcellentTier A: Very GoodTier B: GoodTier C: AcceptableTier D: Avoid

How to choose a PSU

The PSU tier list is based on actual internal component quality. Tier S PSUs use high-quality Japanese capacitors and proven reliability. Tier A is an excellent choice for most users. Avoid Tier C and D for gaming or workstation builds — a failing PSU can damage your expensive components.

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