Hardware Spec Index

Caldera PW-4638 XT 850W 80 PLUS Bronze ATX Power Supply

Power Supplies · Caldera · SKU PW4638-XT · Released 2019 · Updated 2026-10-19

Key facts

Benchmark index1,396 (Power Supplies scale)
Category rank#14,274
Street price$79
Power850 W (rated)
Performance per dollar17.67
Released2019

Specifications

BrandCaldera
ModelCaldera PW-4638 XT
Rated output850 W continuous
Efficiency80 PLUS Bronze (85% at 50% load, 115 V)
StandardATX 12V 2.53
GPU powerNone
PCIe 8-pin3×
Form factorATX
ModularityNon-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

Similar Power Supplies

ModelBenchmarkPriceCompare
Novexa PW-5627 Max 650W 80 PLUS Bronze SFX Power Supply892$49Compare
Novexa PW-5146 Prime 550W 80 PLUS Bronze SFX Power Supply841$39Compare
Caldera PW-4929 Prime 1000W 80 PLUS Platinum ATX Power Supply1,857$189Compare
Vantrel PW-1149 Max 750W 80 PLUS Gold SFX Power Supply1,419$79Compare
Teralux PW-2644 Ti 550W 80 PLUS Bronze ATX 3.1 Power Supply978$49Compare
Caldera PW-6468 Max 750W 80 PLUS Gold ATX Power Supply1,284$69Compare

All Power Supplies · JSON

Cite this page: Hardware Spec Index, “Caldera PW-4638 XT 850W 80 PLUS Bronze ATX Power Supply”, https://vextor7.com/item/21392738 (accessed 2026-10-19).