Hardware Spec Index

Caldera PW-4449 Ultra 850W 80 PLUS Gold SFX Power Supply

Power Supplies · Caldera · SKU PW4449-ULTRA · Released 2022 · Updated 2026-10-20

Key facts

Benchmark index1,889 (Power Supplies scale)
Category rank#32,081
Street price$139
Power850 W (rated)
Performance per dollar13.59
Released2022

Specifications

BrandCaldera
ModelCaldera PW-4449 Ultra
Rated output850 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-pin2×
Form factorSFX-L
ModularityFully modular
Fan120 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
Novexa PW-4866 Pro 850W 80 PLUS Gold ATX 3.0 Power Supply1,956$169Compare
Teralux PW-8177 SE 850W 80 PLUS Platinum ATX 3.1 Power Supply1,960$189Compare
Teralux PW-8228 Pro 650W 80 PLUS Gold ATX 3.1 Power Supply1,346$79Compare
Teralux PW-7812 XT 650W 80 PLUS Bronze SFX Power Supply814$39Compare
Caldera PW-7939 Ti 1200W 80 PLUS Platinum ATX Power Supply2,620$289Compare
Teralux PW-5011 Ti 1200W 80 PLUS Gold ATX Power Supply2,349$229Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-4449 Ultra 850W 80 PLUS Gold SFX Power Supply”, https://vextor7.com/item/332242 (accessed 2026-10-20).