Hardware Spec Index

Caldera PW-4278 Pro 1200W 80 PLUS Platinum ATX Power Supply

Power Supplies · Caldera · SKU PW4278-PRO · Released 2020 · Updated 2026-10-19

Key facts

Benchmark index2,661 (Power Supplies scale)
Category rank#24,208
Street price$319
Power1200 W (rated)
Performance per dollar8.34
Released2020

Specifications

BrandCaldera
ModelCaldera PW-4278 Pro
Rated output1,200 W continuous
Efficiency80 PLUS Platinum (92% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin4×
Form factorATX
ModularityFully modular
Fan120 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 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

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Cite this page: Hardware Spec Index, “Caldera PW-4278 Pro 1200W 80 PLUS Platinum ATX Power Supply”, https://vextor7.com/item/1100397 (accessed 2026-10-19).