Hardware Spec Index

Caldera PW-6403 Ultra 550W 80 PLUS Bronze ATX 3.0 Power Supply

Power Supplies · Caldera · SKU PW6403-ULTRA · Released 2022 · Updated 2026-10-25

Key facts

Benchmark index831 (Power Supplies scale)
Category rank#35,279
Street price$39
Power550 W (rated)
Performance per dollar21.31
Released2022

Specifications

BrandCaldera
ModelCaldera PW-6403 Ultra
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 3.0 / PCIe CEM 5.0
GPU power1× 12VHPWR (600 W)
PCIe 8-pin1×
Form factorATX
ModularitySemi-modular
Fan140 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
Novexa PW-8935 Plus 1300W 80 PLUS Gold ATX 3.1 Power Supply2,593$289Compare
Teralux PW-7004 Max 1000W 80 PLUS Gold SFX Power Supply1,949$169Compare
Caldera PW-2711 SE 650W 80 PLUS Bronze ATX 3.1 Power Supply864$39Compare
Zephyra PW-9061 Edge 1000W 80 PLUS Gold ATX Power Supply1,980$179Compare
Caldera PW-4288 Ultra 550W 80 PLUS Bronze ATX Power Supply1,062$49Compare
Novexa PW-3883 Core 550W 80 PLUS Bronze ATX 3.1 Power Supply1,019$49Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-6403 Ultra 550W 80 PLUS Bronze ATX 3.0 Power Supply”, https://vextor7.com/item/54776621 (accessed 2026-10-25).