Hardware Spec Index

Novexa PW-8403 XT 550W 80 PLUS Gold ATX 3.1 Power Supply

Power Supplies · Novexa · SKU PW8403-XT · Released 2026 · Updated 2026-10-24

Key facts

Benchmark index925 (Power Supplies scale)
Category rank#25,781
Street price$39
Power550 W (rated)
Performance per dollar23.72
Released2026

Specifications

BrandNovexa
ModelNovexa PW-8403 XT
Rated output550 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-pin1×
Form factorATX
ModularityFully modular
Fan120 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
Novexa PW-3139 Core 1000W 80 PLUS Titanium ATX 3.0 Power Supply2,360$229Compare
Caldera PW-7926 SE 850W 80 PLUS Bronze ATX 3.0 Power Supply1,338$89Compare
Novexa PW-3809 Ultra 1000W 80 PLUS Gold ATX 3.1 Power Supply2,176$199Compare
Caldera PW-2334 Ti 850W 80 PLUS Gold SFX Power Supply1,547$99Compare
Vantrel PW-8782 SE 1000W 80 PLUS Gold ATX 3.0 Power Supply2,242$219Compare
Caldera PW-4618 XT 1600W 80 PLUS Titanium ATX Power Supply2,980$369Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Novexa PW-8403 XT 550W 80 PLUS Gold ATX 3.1 Power Supply”, https://vextor7.com/item/72534017 (accessed 2026-10-24).