Hardware Spec Index

Zephyra PW-3891 Plus 850W 80 PLUS Platinum ATX 3.1 Power Supply

Power Supplies · Zephyra · SKU PW3891-PLUS · Released 2024 · Updated 2026-10-24

Key facts

Benchmark index1,836 (Power Supplies scale)
Category rank#47,820
Street price$169
Power850 W (rated)
Performance per dollar10.86
Released2024

Specifications

BrandZephyra
ModelZephyra PW-3891 Plus
Rated output850 W continuous
Efficiency80 PLUS Platinum (92% 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
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

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Cite this page: Hardware Spec Index, “Zephyra PW-3891 Plus 850W 80 PLUS Platinum ATX 3.1 Power Supply”, https://vextor7.com/item/6760679 (accessed 2026-10-24).