Hardware Spec Index

Caldera PW-6303 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply

Power Supplies · Caldera · SKU PW6303-ULTRA · Released 2024 · Updated 2026-10-25

Key facts

Benchmark index1,608 (Power Supplies scale)
Category rank#27,632
Street price$129
Power850 W (rated)
Performance per dollar12.47
Released2024

Specifications

BrandCaldera
ModelCaldera PW-6303 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
Fan120 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
Teralux PW-7145 Ultra 1300W 80 PLUS Gold ATX 3.0 Power Supply2,424$249Compare
Teralux PW-1550 SE 550W 80 PLUS Gold ATX Power Supply1,153$59Compare
Vantrel PW-6500 Ultra 650W 80 PLUS Gold SFX Power Supply1,305$69Compare
Novexa PW-8740 Pro 1000W 80 PLUS Gold ATX 3.0 Power Supply2,015$189Compare
Novexa PW-4209 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply1,837$149Compare
Novexa PW-4018 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply1,864$139Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-6303 Ultra 850W 80 PLUS Gold ATX 3.1 Power Supply”, https://vextor7.com/item/91057440 (accessed 2026-10-25).