Hardware Spec Index

Caldera PW-9591 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply

Power Supplies · Caldera · SKU PW9591-ULTRA · Released 2024 · Updated 2026-10-20

Key facts

Benchmark index1,310 (Power Supplies scale)
Category rank#10,821
Street price$79
Power850 W (rated)
Performance per dollar16.58
Released2024

Specifications

BrandCaldera
ModelCaldera PW-9591 Ultra
Rated output850 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 3.1 / PCIe CEM 5.1
GPU power1× 12V-2x6 (600 W)
PCIe 8-pin2×
Form factorATX
ModularityFully modular
Fan135 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 17 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
Zephyra PW-7257 Pro 750W 80 PLUS Gold ATX 3.0 Power Supply1,325$89Compare
Vantrel PW-3551 Ti 1300W 80 PLUS Titanium ATX 3.1 Power Supply2,630$289Compare
Novexa PW-6696 SE 1200W 80 PLUS Gold ATX 3.1 Power Supply2,123$219Compare
Vantrel PW-2633 Prime 850W 80 PLUS Gold ATX 3.1 Power Supply1,794$139Compare
Caldera PW-8972 SE 850W 80 PLUS Bronze ATX 3.1 Power Supply1,343$89Compare
Vantrel PW-3922 Edge 850W 80 PLUS Gold ATX 3.1 Power Supply1,590$109Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-9591 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply”, https://vextor7.com/item/2948383 (accessed 2026-10-20).