Hardware Spec Index

Caldera PW-5857 Ultra 550W 80 PLUS Bronze ATX Power Supply

Power Supplies · Caldera · SKU PW5857-ULTRA · Released 2019 · Updated 2026-10-19

Key facts

Benchmark index1,136 (Power Supplies scale)
Category rank#25,477
Street price$59
Power550 W (rated)
Performance per dollar19.25
Released2019

Specifications

BrandCaldera
ModelCaldera PW-5857 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
ModularitySemi-modular
Fan120 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
Caldera PW-4318 Ultra 1300W 80 PLUS Titanium ATX 3.0 Power Supply2,479$249Compare
Novexa PW-4164 Prime 1000W 80 PLUS Platinum SFX Power Supply1,949$139Compare
Caldera PW-3835 Plus 850W 80 PLUS Bronze ATX 3.1 Power Supply1,421$99Compare
Teralux PW-8632 Pro 750W 80 PLUS Bronze ATX Power Supply1,280$69Compare
Caldera PW-5421 Prime 650W 80 PLUS Bronze ATX 3.1 Power Supply1,001$49Compare
Teralux PW-2543 XT 1000W 80 PLUS Platinum ATX Power Supply1,768$149Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-5857 Ultra 550W 80 PLUS Bronze ATX Power Supply”, https://vextor7.com/item/298689 (accessed 2026-10-19).