Hardware Spec Index

Novexa PW-1881 XT 550W 80 PLUS Gold ATX 3.0 Power Supply

Power Supplies · Novexa · SKU PW1881-XT · Released 2023 · Updated 2026-10-26

Key facts

Benchmark index752 (Power Supplies scale)
Category rank#17,656
Street price$39
Power550 W (rated)
Performance per dollar19.28
Released2023

Specifications

BrandNovexa
ModelNovexa PW-1881 XT
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 factorATX
ModularityFully modular
Fan135 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 17 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
Caldera PW-2518 Prime 850W 80 PLUS Gold SFX Power Supply1,751$129Compare
Zephyra PW-8575 SE 850W 80 PLUS Gold ATX Power Supply1,608$119Compare
Zephyra PW-5403 XT 850W 80 PLUS Bronze ATX 3.1 Power Supply1,343$69Compare
Teralux PW-1235 Pro 1300W 80 PLUS Gold ATX Power Supply2,439$269Compare
Novexa PW-9589 Ultra 1600W 80 PLUS Platinum ATX 3.1 Power Supply2,665$289Compare
Caldera PW-5291 Max 1000W 80 PLUS Gold ATX 3.1 Power Supply2,052$189Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Novexa PW-1881 XT 550W 80 PLUS Gold ATX 3.0 Power Supply”, https://vextor7.com/item/19659166 (accessed 2026-10-26).