Hardware Spec Index

Caldera PW-2951 Ultra 850W 80 PLUS Gold ATX Power Supply

Power Supplies · Caldera · SKU PW2951-ULTRA · Released 2020 · Updated 2026-10-21

Key facts

Benchmark index1,612 (Power Supplies scale)
Category rank#12,852
Street price$99
Power850 W (rated)
Performance per dollar16.28
Released2020

Specifications

BrandCaldera
ModelCaldera PW-2951 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
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
Caldera PW-8038 Pro 550W 80 PLUS Bronze ATX Power Supply845$39Compare
Caldera PW-4646 Plus 1300W 80 PLUS Titanium ATX Power Supply2,663$319Compare
Zephyra PW-6538 Pro 650W 80 PLUS Bronze ATX Power Supply954$49Compare
Teralux PW-9889 Ultra 850W 80 PLUS Gold ATX Power Supply1,393$89Compare
Zephyra PW-1409 Max 1000W 80 PLUS Platinum ATX Power Supply2,322$229Compare
Teralux PW-4927 Ultra 1300W 80 PLUS Titanium ATX Power Supply2,978$399Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-2951 Ultra 850W 80 PLUS Gold ATX Power Supply”, https://vextor7.com/item/6399294 (accessed 2026-10-21).