Hardware Spec Index

Caldera PW-4421 Ultra 1000W 80 PLUS Gold ATX Power Supply

Power Supplies · Caldera · SKU PW4421-ULTRA · Released 2021 · Updated 2026-10-18

Key facts

Benchmark index1,919 (Power Supplies scale)
Category rank#39,005
Street price$199
Power1000 W (rated)
Performance per dollar9.64
Released2021

Specifications

BrandCaldera
ModelCaldera PW-4421 Ultra
Rated output1,000 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin4×
Form factorATX
ModularityFully modular
Fan135 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 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
Vantrel PW-2175 Ultra 550W 80 PLUS Bronze ATX Power Supply903$39Compare
Teralux PW-9548 Plus 650W 80 PLUS Bronze ATX 3.1 Power Supply1,408$79Compare
Novexa PW-8469 Pro 1000W 80 PLUS Platinum ATX 3.1 Power Supply2,147$219Compare
Zephyra PW-2346 Edge 550W 80 PLUS Bronze ATX Power Supply692$39Compare
Novexa PW-2923 Pro 1600W 80 PLUS Titanium ATX 3.1 Power Supply2,777$369Compare
Caldera PW-3261 Max 750W 80 PLUS Gold ATX 3.1 Power Supply1,149$59Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-4421 Ultra 1000W 80 PLUS Gold ATX Power Supply”, https://vextor7.com/item/9477331 (accessed 2026-10-18).