Hardware Spec Index

Novexa PW-8859 XT 550W 80 PLUS Gold ATX 3.0 Power Supply

Power Supplies · Novexa · SKU PW8859-XT · Released 2022 · Updated 2026-10-18

Key facts

Benchmark index917 (Power Supplies scale)
Category rank#848
Street price$39
Power550 W (rated)
Performance per dollar23.51
Released2022

Specifications

BrandNovexa
ModelNovexa PW-8859 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
Fan140 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-3255 Plus 750W 80 PLUS Gold SFX Power Supply1,562$119Compare
Novexa PW-9395 Ti 1000W 80 PLUS Platinum ATX Power Supply2,288$249Compare
Novexa PW-8749 Max 650W 80 PLUS Gold ATX Power Supply1,292$79Compare
Zephyra PW-2775 Max 1000W 80 PLUS Gold SFX Power Supply2,187$209Compare
Vantrel PW-3627 XT 1600W 80 PLUS Titanium ATX 3.1 Power Supply2,649$319Compare
Vantrel PW-3680 Pro 1300W 80 PLUS Titanium ATX Power Supply2,449$319Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Novexa PW-8859 XT 550W 80 PLUS Gold ATX 3.0 Power Supply”, https://vextor7.com/item/1754826 (accessed 2026-10-18).