Hardware Spec Index

Zephyra PW-7957 Ultra 550W 80 PLUS Bronze ATX Power Supply

Power Supplies · Zephyra · SKU PW7957-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index799 (Power Supplies scale)
Category rank#14,691
Street price$39
Power550 W (rated)
Performance per dollar20.49
Released2021

Specifications

BrandZephyra
ModelZephyra PW-7957 Ultra
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin2×
Form factorATX
ModularitySemi-modular
Fan140 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
Teralux PW-5500 Core 650W 80 PLUS Gold ATX 3.1 Power Supply1,216$69Compare
Novexa PW-3773 Ultra 1000W 80 PLUS Gold ATX 3.1 Power Supply2,217$189Compare
Novexa PW-7082 Plus 1200W 80 PLUS Platinum ATX Power Supply2,741$339Compare
Novexa PW-1477 Core 1000W 80 PLUS Platinum ATX 3.0 Power Supply2,208$219Compare
Caldera PW-6557 Max 1000W 80 PLUS Gold ATX 3.1 Power Supply1,569$129Compare
Vantrel PW-1348 Prime 1300W 80 PLUS Gold ATX Power Supply2,392$319Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Zephyra PW-7957 Ultra 550W 80 PLUS Bronze ATX Power Supply”, https://vextor7.com/item/14548728 (accessed 2026-10-22).