Hardware Spec Index

Zephyra PW-2281 Prime 550W 80 PLUS Bronze ATX Power Supply

Power Supplies · Zephyra · SKU PW2281-PRIME · Released 2021 · Updated 2026-10-24

Key facts

Benchmark index834 (Power Supplies scale)
Category rank#23,933
Street price$39
Power550 W (rated)
Performance per dollar21.38
Released2021

Specifications

BrandZephyra
ModelZephyra PW-2281 Prime
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin2×
Form factorATX
ModularityNon-modular
Fan120 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 ms
ProtectionsOCP, OVP, UVP, OPP, OTP, SCP
Warranty5 years

Related guides

80 PLUS Efficiency Ratings ExplainedATX 3.1 Power Supplies and the 12V-2x6 Connector

Similar Power Supplies

ModelBenchmarkPriceCompare
Vantrel PW-7649 XT 1600W 80 PLUS Titanium ATX Power Supply2,725$349Compare
Vantrel PW-1818 Plus 1000W 80 PLUS Gold SFX Power Supply2,331$219Compare
Vantrel PW-4006 Plus 850W 80 PLUS Gold SFX Power Supply1,606$109Compare
Novexa PW-6239 Core 650W 80 PLUS Gold ATX 3.0 Power Supply1,384$79Compare
Caldera PW-2586 SE 650W 80 PLUS Bronze ATX 3.1 Power Supply1,050$59Compare
Caldera PW-1829 Edge 750W 80 PLUS Gold ATX 3.0 Power Supply1,394$79Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Zephyra PW-2281 Prime 550W 80 PLUS Bronze ATX Power Supply”, https://vextor7.com/item/7315849 (accessed 2026-10-24).