Hardware Spec Index

Zephyra PW-3940 SE 850W 80 PLUS Bronze ATX 3.1 Power Supply

Power Supplies · Zephyra · SKU PW3940-SE · Released 2025 · Updated 2026-10-24

Key facts

Benchmark index1,309 (Power Supplies scale)
Category rank#13,464
Street price$69
Power850 W (rated)
Performance per dollar18.97
Released2025

Specifications

BrandZephyra
ModelZephyra PW-3940 SE
Rated output850 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 3.1 / PCIe CEM 5.1
GPU power1× 12V-2x6 (600 W)
PCIe 8-pin2×
Form factorATX
ModularitySemi-modular
Fan140 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
Caldera PW-1717 Pro 750W 80 PLUS Gold ATX 3.1 Power Supply1,126$59Compare
Teralux PW-1429 Ti 550W 80 PLUS Gold ATX 3.0 Power Supply1,220$69Compare
Zephyra PW-1398 Max 1200W 80 PLUS Platinum ATX 3.0 Power Supply2,409$279Compare
Teralux PW-3145 Pro 1000W 80 PLUS Gold ATX Power Supply2,010$179Compare
Teralux PW-2579 SE 850W 80 PLUS Gold SFX Power Supply1,527$119Compare
Novexa PW-6648 Core 850W 80 PLUS Gold SFX Power Supply1,412$89Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Zephyra PW-3940 SE 850W 80 PLUS Bronze ATX 3.1 Power Supply”, https://vextor7.com/item/73678802 (accessed 2026-10-24).