Hardware Spec Index

Caldera PW-9975 XT 550W 80 PLUS Bronze ATX Power Supply

Power Supplies · Caldera · SKU PW9975-XT · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index1,015 (Power Supplies scale)
Category rank#6,053
Street price$49
Power550 W (rated)
Performance per dollar20.71
Released2021

Specifications

BrandCaldera
ModelCaldera PW-9975 XT
Rated output550 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin2×
Form factorATX
ModularitySemi-modular
Fan120 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 ms
ProtectionsOCP, OVP, UVP, OPP, OTP, SCP
Warranty7 years

Related guides

80 PLUS Efficiency Ratings ExplainedATX 3.1 Power Supplies and the 12V-2x6 Connector

Similar Power Supplies

ModelBenchmarkPriceCompare
Vantrel PW-3096 Max 550W 80 PLUS Bronze ATX 3.1 Power Supply1,176$59Compare
Zephyra PW-7036 SE 1200W 80 PLUS Titanium ATX 3.1 Power Supply2,739$309Compare
Caldera PW-1442 Pro 650W 80 PLUS Bronze ATX Power Supply756$39Compare
Caldera PW-3451 Core 1600W 80 PLUS Titanium ATX 3.0 Power Supply2,893$379Compare
Caldera PW-4930 Plus 850W 80 PLUS Gold ATX Power Supply1,653$119Compare
Zephyra PW-3397 Pro 1600W 80 PLUS Titanium ATX 3.1 Power Supply2,850$379Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-9975 XT 550W 80 PLUS Bronze ATX Power Supply”, https://vextor7.com/item/9770460 (accessed 2026-10-22).