Hardware Spec Index

Zephyra PW-4877 Ultra 550W 80 PLUS Gold SFX Power Supply

Power Supplies · Zephyra · SKU PW4877-ULTRA · Released 2023 · Updated 2026-10-22

Key facts

Benchmark index884 (Power Supplies scale)
Category rank#8,709
Street price$49
Power550 W (rated)
Performance per dollar18.04
Released2023

Specifications

BrandZephyra
ModelZephyra PW-4877 Ultra
Rated output550 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 3.0 / PCIe CEM 5.0
GPU power1× 12VHPWR (600 W)
PCIe 8-pin1×
Form factorSFX-L
ModularityFully modular
Fan120 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 17 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
Caldera PW-5666 SE 1600W 80 PLUS Titanium ATX Power Supply2,637$289Compare
Vantrel PW-7070 Edge 850W 80 PLUS Gold SFX Power Supply1,788$129Compare
Caldera PW-2632 Ti 1600W 80 PLUS Gold ATX 3.0 Power Supply2,463$299Compare
Teralux PW-6483 XT 1600W 80 PLUS Titanium ATX 3.1 Power Supply2,980$399Compare
Teralux PW-9622 Edge 1200W 80 PLUS Gold ATX 3.1 Power Supply2,217$219Compare
Novexa PW-5134 Plus 650W 80 PLUS Bronze ATX 3.1 Power Supply967$49Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Zephyra PW-4877 Ultra 550W 80 PLUS Gold SFX Power Supply”, https://vextor7.com/item/518378 (accessed 2026-10-22).