Hardware Spec Index

Caldera PW-2881 XT 550W 80 PLUS Gold ATX 3.0 Power Supply

Power Supplies · Caldera · SKU PW2881-XT · Released 2023 · Updated 2026-10-22

Key facts

Benchmark index816 (Power Supplies scale)
Category rank#41,277
Street price$39
Power550 W (rated)
Performance per dollar20.92
Released2023

Specifications

BrandCaldera
ModelCaldera PW-2881 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
Teralux PW-8416 XT 550W 80 PLUS Bronze ATX 3.1 Power Supply761$39Compare
Zephyra PW-2850 Plus 1000W 80 PLUS Gold ATX Power Supply2,060$199Compare
Vantrel PW-1451 Ultra 850W 80 PLUS Platinum ATX 3.1 Power Supply1,966$159Compare
Caldera PW-5103 Max 650W 80 PLUS Bronze ATX 3.1 Power Supply849$39Compare
Novexa PW-7204 Plus 850W 80 PLUS Gold ATX 3.0 Power Supply1,178$69Compare
Vantrel PW-5272 Max 1200W 80 PLUS Titanium ATX 3.1 Power Supply2,191$249Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-2881 XT 550W 80 PLUS Gold ATX 3.0 Power Supply”, https://vextor7.com/item/19630144 (accessed 2026-10-22).