Hardware Spec Index

Caldera PW-2831 Ultra 650W 80 PLUS Gold SFX Power Supply

Power Supplies · Caldera · SKU PW2831-ULTRA · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index1,404 (Power Supplies scale)
Category rank#24,027
Street price$79
Power650 W (rated)
Performance per dollar17.77
Released2021

Specifications

BrandCaldera
ModelCaldera PW-2831 Ultra
Rated output650 W continuous
Efficiency80 PLUS Gold (90% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin2×
Form factorSFX-L
ModularityFully modular
Fan120 mm fluid dynamic bearing, zero-RPM mode
Hold-up time≥ 16 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

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Cite this page: Hardware Spec Index, “Caldera PW-2831 Ultra 650W 80 PLUS Gold SFX Power Supply”, https://vextor7.com/item/2200510 (accessed 2026-10-19).