Hardware Spec Index

Novexa PW-4456 Ultra 850W 80 PLUS Gold ATX Power Supply

Power Supplies · Novexa · SKU PW4456-ULTRA · Released 2019 · Updated 2026-10-24

Key facts

Benchmark index1,703 (Power Supplies scale)
Category rank#35,343
Street price$139
Power850 W (rated)
Performance per dollar12.25
Released2019

Specifications

BrandNovexa
ModelNovexa PW-4456 Ultra
Rated output850 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin3×
Form factorATX
ModularityFully modular
Fan140 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 ms
ProtectionsOCP, OVP, UVP, OPP, OTP, SCP
Warranty10 years

Related guides

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

Similar Power Supplies

ModelBenchmarkPriceCompare
Zephyra PW-1288 Pro 1600W 80 PLUS Titanium ATX Power Supply2,980$339Compare
Caldera PW-9643 Max 1200W 80 PLUS Titanium ATX Power Supply2,412$249Compare
Teralux PW-6741 Ultra 650W 80 PLUS Gold ATX 3.0 Power Supply1,192$69Compare
Zephyra PW-5509 Core 750W 80 PLUS Bronze ATX 3.1 Power Supply1,051$49Compare
Vantrel PW-8950 Max 1000W 80 PLUS Gold ATX Power Supply2,171$199Compare
Caldera PW-5314 Ultra 1000W 80 PLUS Gold ATX Power Supply1,821$149Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Novexa PW-4456 Ultra 850W 80 PLUS Gold ATX Power Supply”, https://vextor7.com/item/8489405 (accessed 2026-10-24).