Hardware Spec Index

Novexa PW-7891 Prime 550W 80 PLUS Bronze ATX 3.0 Power Supply

Power Supplies · Novexa · SKU PW7891-PRIME · Released 2022 · Updated 2026-10-26

Key facts

Benchmark index927 (Power Supplies scale)
Category rank#1,089
Street price$39
Power550 W (rated)
Performance per dollar23.77
Released2022

Specifications

BrandNovexa
ModelNovexa PW-7891 Prime
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 3.0 / PCIe CEM 5.0
GPU power1× 12VHPWR (600 W)
PCIe 8-pin1×
Form factorATX
ModularitySemi-modular
Fan140 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
Zephyra PW-5676 Prime 1000W 80 PLUS Gold ATX Power Supply2,169$229Compare
Caldera PW-1209 XT 1000W 80 PLUS Gold ATX 3.0 Power Supply1,911$139Compare
Novexa PW-1147 Prime 1000W 80 PLUS Platinum ATX 3.1 Power Supply1,964$169Compare
Caldera PW-4610 Ti 1000W 80 PLUS Gold ATX Power Supply2,025$199Compare
Caldera PW-2267 Pro 850W 80 PLUS Gold ATX 3.0 Power Supply1,551$99Compare
Caldera PW-1821 Max 850W 80 PLUS Gold ATX Power Supply1,698$109Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Novexa PW-7891 Prime 550W 80 PLUS Bronze ATX 3.0 Power Supply”, https://vextor7.com/item/77794525 (accessed 2026-10-26).