Tier B and above - required to have OTP (just claimed is enough, but if it's tested and the unit did not survive - detier to LP subtier), to have OPP tested (detier to tier C if failed), be based on ACRF or ZVS primary, DC-DC secondary topology, and have APFC with full VAC input range (100-230V) voltage regulation and ripple should be in spec under 110% overload 12V ripple below 100mV under 110% overload 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) ATX 3.0 subsection requires an Intel DB entry or third party power excustion tests. 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 - OTP should be tested (if not tested - detier to SP subtier), working and set below 200☌ (if it's set higher - detier to LP subtier), 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.
EVGA SUPERNOVA 850 MANUAL
Pay attention to rails configuration in the PSU manual to balance out the load. Multi-rail units - Offer better protection against inadvertent cable overload (which is especially relevant for high-capacity units) but can be problematic when used with very high transient power draw GPUs. 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 very limited info, without proper reviews. 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 an card with detailed information and links to Amazon Slash - Models (inside one series) separator Hyphen / Dash - Series / lineups separator Does not require quiet operation for tiers B/C.īlue highlight - Quiet operation under moderate load Gold highlight - Best units in the tier, proven by professional reviews.
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