Hardware Spec Index

Caldera PW-3981 Ultra 850W 80 PLUS Gold ATX Power Supply

Power Supplies · Caldera · SKU PW3981-ULTRA · Released 2020 · Updated 2026-10-25

Key facts

Benchmark index1,847 (Power Supplies scale)
Category rank#36,239
Street price$149
Power850 W (rated)
Performance per dollar12.40
Released2020

Specifications

BrandCaldera
ModelCaldera PW-3981 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
Fan140 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 ms
ProtectionsOCP, OVP, UVP, OPP, OTP, SCP
Warranty10 years

Related guides

80 PLUS Efficiency Ratings ExplainedATX 3.1 Power Supplies and the 12V-2x6 Connector

Similar Power Supplies

ModelBenchmarkPriceCompare
Caldera PW-4014 Plus 550W 80 PLUS Gold ATX 3.1 Power Supply829$39Compare
Teralux PW-9568 Core 650W 80 PLUS Gold ATX Power Supply787$39Compare
Vantrel PW-2534 Max 750W 80 PLUS Bronze SFX Power Supply1,239$69Compare
Zephyra PW-1876 Edge 1300W 80 PLUS Titanium ATX 3.1 Power Supply2,749$389Compare
Vantrel PW-5720 Ti 1300W 80 PLUS Platinum ATX Power Supply2,744$379Compare
Novexa PW-2417 Max 650W 80 PLUS Bronze ATX 3.0 Power Supply1,010$49Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-3981 Ultra 850W 80 PLUS Gold ATX Power Supply”, https://vextor7.com/item/94518556 (accessed 2026-10-25).