Hardware Spec Index

Caldera PW-1840 Ultra 850W 80 PLUS Gold ATX Power Supply

Power Supplies · Caldera · SKU PW1840-ULTRA · Released 2019 · Updated 2026-10-20

Key facts

Benchmark index1,483 (Power Supplies scale)
Category rank#40,268
Street price$89
Power850 W (rated)
Performance per dollar16.66
Released2019

Specifications

BrandCaldera
ModelCaldera PW-1840 Ultra
Rated output850 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin3×
Form factorATX
ModularityFully 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
Zephyra PW-5590 Ultra 550W 80 PLUS Bronze ATX 3.0 Power Supply1,021$59Compare
Caldera PW-4978 Ultra 1200W 80 PLUS Platinum ATX 3.1 Power Supply2,441$259Compare
Zephyra PW-9451 XT 1000W 80 PLUS Gold ATX Power Supply1,983$159Compare
Caldera PW-5854 Edge 850W 80 PLUS Gold ATX 3.1 Power Supply1,468$99Compare
Vantrel PW-6496 Max 1600W 80 PLUS Platinum ATX Power Supply2,976$379Compare
Teralux PW-3884 Ultra 850W 80 PLUS Gold ATX 3.0 Power Supply1,297$79Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-1840 Ultra 850W 80 PLUS Gold ATX Power Supply”, https://vextor7.com/item/7914636 (accessed 2026-10-20).