![]() ![]() Tier B and above - required to have OTP (just claimed is enough), be based on ACRF or ZVS primary, DC-DC secondary topology, and have APFC with full VAC input range voltage regulation and ripple should be in spec under 110% overload 12V ripple below 100mV under 110% overload on all rails should be rated for continuous operation at minimum 40☌ ambient (not just 'operating conditions' but unless proven to not qualify by testing, only claimed operating conditions without continous operation remark is enough) Requires reviews with transient response and protection tests (OCP, OPP, OTP) either on the unit directly for normal priority or other unit using the same platform in similiar configuration which is confirmed by a teardown for speculative position subtier. Minimum 18AWG gauge wires for hot 12V leads on GPU/EPS/ATX cables, on pig-tail cables - at least to the first connector, 20AWG to the second or for ground leads. Tier A - required to be based on ZVS primary topology (LLC or phase shift resonant), have ripple below 50mV under all load situations up-to 110% overload, 30k hours MTBF at 40☌ (generally non-plain-sleeve bearing) or be fanless. Pay attention to rails configuration when using with high power draw components to avoid shutdowns. Multi-rail units - Not necessarily better than single-rail units but provide an extra layer of protection by having 12V OCP set lower than total capacity, which is especially relevant for very high-capacity units (=>1kW). Not recommended for purchase over any normal priority units or even some of the better units from a lower tier. Speculative position subtiers - For units positioned based on limited info, but enough to reasonably assume that they're very similar to other units there are proper reviews on. ![]() Not recommended for purchase over any normal priority units. Low priority subtiers - Units with minor issues (see footnotes). Numbers in red colored square brackets - Footnotes, see descriptions at the end of respective tiers Square brackets - Additional description (wattage range, part of SKU code, label / casing color, release year) Parenthesis / Round brackets - Model variations (which belong to the same position) Underlined - Opens menu with more information and links to Amazon Slash - Models (inside one series) separator ![]() Hyphen / Dash - Series / lineups separator Requires 16AWG wire gauge in pig-tailed cables and quiet operation under reasonable load levels for tier A.īlue highlight - Quiet operation under moderate load High quality and performance proven by professional reviews. ![]()
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March 2023
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