Hardware Spec Index

Zephyra PW-7977 Prime 550W 80 PLUS Gold ATX Power Supply

Power Supplies · Zephyra · SKU PW7977-PRIME · Released 2019 · Updated 2026-10-23

Key facts

Benchmark index778 (Power Supplies scale)
Category rank#4,287
Street price$39
Power550 W (rated)
Performance per dollar19.95
Released2019

Specifications

BrandZephyra
ModelZephyra PW-7977 Prime
Rated output550 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin2×
Form factorATX
ModularityFully modular
Fan120 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 ms
ProtectionsOCP, OVP, UVP, OPP, OTP, SCP
Warranty7 years

Related guides

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

Similar Power Supplies

ModelBenchmarkPriceCompare
Novexa PW-8047 XT 1200W 80 PLUS Gold ATX 3.1 Power Supply2,413$279Compare
Teralux PW-7728 Ti 1200W 80 PLUS Titanium ATX Power Supply2,229$229Compare
Teralux PW-6702 Edge 850W 80 PLUS Gold ATX Power Supply1,470$119Compare
Novexa PW-2402 Core 850W 80 PLUS Gold ATX 3.1 Power Supply1,654$109Compare
Caldera PW-3425 Pro 550W 80 PLUS Gold ATX Power Supply996$49Compare
Novexa PW-3558 Max 850W 80 PLUS Gold ATX 3.1 Power Supply1,573$109Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Zephyra PW-7977 Prime 550W 80 PLUS Gold ATX Power Supply”, https://vextor7.com/item/15325973 (accessed 2026-10-23).