Hardware Spec Index

Zephyra PW-8421 Ultra 750W 80 PLUS Bronze ATX 3.1 Power Supply

Power Supplies · Zephyra · SKU PW8421-ULTRA · Released 2025 · Updated 2026-10-18

Key facts

Benchmark index1,087 (Power Supplies scale)
Category rank#17,467
Street price$59
Power750 W (rated)
Performance per dollar18.42
Released2025

Specifications

BrandZephyra
ModelZephyra PW-8421 Ultra
Rated output750 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
ModularityNon-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
Caldera PW-4129 XT 550W 80 PLUS Bronze ATX Power Supply839$39Compare
Teralux PW-3479 Core 650W 80 PLUS Bronze ATX 3.1 Power Supply740$39Compare
Novexa PW-6072 Ultra 750W 80 PLUS Gold ATX 3.1 Power Supply1,609$109Compare
Teralux PW-3156 Pro 550W 80 PLUS Bronze ATX 3.0 Power Supply1,014$49Compare
Novexa PW-1072 Core 750W 80 PLUS Gold SFX Power Supply1,426$79Compare
Teralux PW-3874 Core 850W 80 PLUS Gold ATX Power Supply1,450$79Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Zephyra PW-8421 Ultra 750W 80 PLUS Bronze ATX 3.1 Power Supply”, https://vextor7.com/item/16004642 (accessed 2026-10-18).