Hardware Spec Index

Caldera PW-4226 Ultra 550W 80 PLUS Bronze SFX Power Supply

Power Supplies · Caldera · SKU PW4226-ULTRA · Released 2026 · Updated 2026-10-24

Key facts

Benchmark index850 (Power Supplies scale)
Category rank#10,963
Street price$39
Power550 W (rated)
Performance per dollar21.79
Released2026

Specifications

BrandCaldera
ModelCaldera PW-4226 Ultra
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 3.1 / PCIe CEM 5.1
GPU power1× 12V-2x6 (600 W)
PCIe 8-pin1×
Form factorSFX-L
ModularitySemi-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
Teralux PW-5094 SE 1300W 80 PLUS Platinum ATX 3.1 Power Supply2,743$349Compare
Vantrel PW-3905 Ultra 1600W 80 PLUS Platinum ATX 3.0 Power Supply2,716$299Compare
Teralux PW-7974 Ultra 750W 80 PLUS Gold ATX 3.0 Power Supply1,565$109Compare
Zephyra PW-1050 XT 550W 80 PLUS Gold ATX Power Supply922$39Compare
Zephyra PW-1953 Core 1600W 80 PLUS Titanium ATX 3.1 Power Supply2,969$359Compare
Novexa PW-8380 Edge 1600W 80 PLUS Platinum ATX 3.0 Power Supply2,717$319Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-4226 Ultra 550W 80 PLUS Bronze SFX Power Supply”, https://vextor7.com/item/6501561 (accessed 2026-10-24).