Hardware Spec Index

Caldera PW-6441 Ultra 650W 80 PLUS Gold ATX 3.1 Power Supply

Power Supplies · Caldera · SKU PW6441-ULTRA · Released 2025 · Updated 2026-10-20

Key facts

Benchmark index1,255 (Power Supplies scale)
Category rank#25,627
Street price$69
Power650 W (rated)
Performance per dollar18.19
Released2025

Specifications

BrandCaldera
ModelCaldera PW-6441 Ultra
Rated output650 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-pin1×
Form factorATX
ModularityFully modular
Fan135 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 17 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-9846 Core 750W 80 PLUS Gold SFX Power Supply1,267$69Compare
Caldera PW-3105 Core 1600W 80 PLUS Platinum ATX 3.1 Power Supply2,687$329Compare
Teralux PW-3632 Core 1600W 80 PLUS Titanium ATX 3.1 Power Supply2,577$339Compare
Novexa PW-4303 Plus 850W 80 PLUS Gold SFX Power Supply1,736$129Compare
Vantrel PW-9823 Pro 1300W 80 PLUS Platinum ATX Power Supply2,543$289Compare
Zephyra PW-4341 Core 1200W 80 PLUS Platinum ATX 3.1 Power Supply2,654$299Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-6441 Ultra 650W 80 PLUS Gold ATX 3.1 Power Supply”, https://vextor7.com/item/21364941 (accessed 2026-10-20).