Hardware Spec Index

Caldera PW-3949 Ultra 550W 80 PLUS Bronze ATX Power Supply

Power Supplies · Caldera · SKU PW3949-ULTRA · Released 2019 · Updated 2026-10-20

Key facts

Benchmark index832 (Power Supplies scale)
Category rank#13,477
Street price$39
Power550 W (rated)
Performance per dollar21.33
Released2019

Specifications

BrandCaldera
ModelCaldera PW-3949 Ultra
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin2×
Form factorATX
ModularityNon-modular
Fan135 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 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
Teralux PW-5036 Plus 1000W 80 PLUS Platinum ATX 3.1 Power Supply2,131$209Compare
Teralux PW-3443 Ti 1600W 80 PLUS Platinum ATX Power Supply2,787$299Compare
Vantrel PW-7101 SE 1000W 80 PLUS Gold ATX 3.1 Power Supply2,062$199Compare
Novexa PW-7056 Max 1000W 80 PLUS Platinum ATX 3.1 Power Supply2,257$249Compare
Novexa PW-8429 Ti 1000W 80 PLUS Gold ATX 3.1 Power Supply2,424$269Compare
Caldera PW-8440 Max 850W 80 PLUS Gold ATX Power Supply1,417$89Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-3949 Ultra 550W 80 PLUS Bronze ATX Power Supply”, https://vextor7.com/item/659676 (accessed 2026-10-20).