Hardware Spec Index

Novexa PW-4557 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply

Power Supplies · Novexa · SKU PW4557-ULTRA · Released 2024 · Updated 2026-10-24

Key facts

Benchmark index1,440 (Power Supplies scale)
Category rank#23,602
Street price$99
Power850 W (rated)
Performance per dollar14.55
Released2024

Specifications

BrandNovexa
ModelNovexa PW-4557 Ultra
Rated output850 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 3.1 / PCIe CEM 5.1
GPU power1× 12V-2x6 (600 W)
PCIe 8-pin2×
Form factorATX
ModularityFully modular
Fan135 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 17 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
Novexa PW-2624 Max 650W 80 PLUS Bronze SFX Power Supply1,082$49Compare
Zephyra PW-1360 Core 1200W 80 PLUS Titanium ATX Power Supply2,149$219Compare
Zephyra PW-7844 Pro 550W 80 PLUS Gold ATX 3.1 Power Supply1,117$59Compare
Novexa PW-3424 Max 850W 80 PLUS Gold ATX 3.1 Power Supply1,515$89Compare
Novexa PW-3905 XT 550W 80 PLUS Bronze ATX 3.0 Power Supply1,053$49Compare
Zephyra PW-5281 Max 1300W 80 PLUS Titanium ATX 3.1 Power Supply2,948$349Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Novexa PW-4557 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply”, https://vextor7.com/item/1521081 (accessed 2026-10-24).