Hardware Spec Index

Caldera PW-9921 Prime 650W 80 PLUS Bronze ATX 3.0 Power Supply

Power Supplies · Caldera · SKU PW9921-PRIME · Released 2023 · Updated 2026-10-19

Key facts

Benchmark index1,258 (Power Supplies scale)
Category rank#15,959
Street price$79
Power650 W (rated)
Performance per dollar15.92
Released2023

Specifications

BrandCaldera
ModelCaldera PW-9921 Prime
Rated output650 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 3.0 / PCIe CEM 5.0
GPU power1× 12VHPWR (600 W)
PCIe 8-pin1×
Form factorATX
ModularitySemi-modular
Fan120 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
Zephyra PW-9921 Prime 850W 80 PLUS Gold ATX Power Supply1,690$119Compare
Zephyra PW-1199 Prime 1000W 80 PLUS Gold ATX Power Supply2,016$179Compare
Teralux PW-7757 Max 1000W 80 PLUS Gold ATX 3.1 Power Supply2,442$249Compare
Novexa PW-7433 Plus 550W 80 PLUS Gold ATX 3.0 Power Supply867$39Compare
Teralux PW-2606 Prime 850W 80 PLUS Platinum ATX 3.1 Power Supply2,054$159Compare
Zephyra PW-5605 Max 1600W 80 PLUS Platinum ATX Power Supply2,933$369Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-9921 Prime 650W 80 PLUS Bronze ATX 3.0 Power Supply”, https://vextor7.com/item/3249147 (accessed 2026-10-19).