Hardware Spec Index

Zephyra PW-8503 Ti 550W 80 PLUS Gold ATX 3.0 Power Supply

Power Supplies · Zephyra · SKU PW8503-TI · Released 2023 · Updated 2026-10-21

Key facts

Benchmark index1,149 (Power Supplies scale)
Category rank#12
Street price$59
Power550 W (rated)
Performance per dollar19.47
Released2023

Specifications

BrandZephyra
ModelZephyra PW-8503 Ti
Rated output550 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 3.0 / PCIe CEM 5.0
GPU power1× 12VHPWR (600 W)
PCIe 8-pin1×
Form factorATX
ModularityFully modular
Fan120 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
Zephyra PW-1230 Ti 550W 80 PLUS Bronze ATX 3.1 Power Supply1,153$59Compare
Caldera PW-1694 SE 750W 80 PLUS Bronze ATX Power Supply1,189$59Compare
Caldera PW-1672 Ti 750W 80 PLUS Bronze ATX Power Supply1,022$49Compare
Zephyra PW-2370 Ti 1600W 80 PLUS Titanium ATX 3.0 Power Supply2,769$319Compare
Vantrel PW-7714 Ultra 1300W 80 PLUS Titanium ATX 3.1 Power Supply2,708$309Compare
Teralux PW-7330 Ultra 1000W 80 PLUS Gold ATX 3.0 Power Supply2,454$259Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Zephyra PW-8503 Ti 550W 80 PLUS Gold ATX 3.0 Power Supply”, https://vextor7.com/item/4162124 (accessed 2026-10-21).