Hardware Spec Index

Caldera PW-2478 Ultra 850W 80 PLUS Bronze ATX Power Supply

Power Supplies · Caldera · SKU PW2478-ULTRA · Released 2019 · Updated 2026-10-19

Key facts

Benchmark index1,377 (Power Supplies scale)
Category rank#34,991
Street price$79
Power850 W (rated)
Performance per dollar17.43
Released2019

Specifications

BrandCaldera
ModelCaldera PW-2478 Ultra
Rated output850 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin3×
Form factorATX
ModularitySemi-modular
Fan140 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
Vantrel PW-7796 Max 1300W 80 PLUS Platinum ATX 3.1 Power Supply2,525$259Compare
Zephyra PW-5669 Ti 1000W 80 PLUS Gold ATX Power Supply1,835$139Compare
Novexa PW-5472 Ti 1300W 80 PLUS Titanium ATX Power Supply2,826$369Compare
Teralux PW-2922 Ti 1000W 80 PLUS Gold SFX Power Supply2,211$229Compare
Novexa PW-3880 Edge 650W 80 PLUS Bronze ATX 3.0 Power Supply865$49Compare
Vantrel PW-6459 Ti 1000W 80 PLUS Gold ATX Power Supply2,045$189Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-2478 Ultra 850W 80 PLUS Bronze ATX Power Supply”, https://vextor7.com/item/5725836 (accessed 2026-10-19).