What is a Power Supply Unit (PSU)?

A Power Supply Unit (PSU) is an internal IT hardware component. Despite the name, Power Supply Units (PSU) do not supply systems with power - instead they convert it.
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HP 0950-4270 - 150W Universal Power Supply Unit (PSU) - CPU Medics

What Are PDU and PSU and What Do They Do ⚡️ —

Anatomy of a Power Supply Unit (PSU) Photo Gallery - TechSpot

Power supply unit (computer) - Wikipedia

Modern power supply unit, PSU for PC computer or workstation isolated on white background Stock Photo - Alamy

HP-233SD - Dell 230-Watts ATX Power Supply Unit PSU — Tech Network Supply LLC

Maximum Power: 500W. For Envy 795-0003UR Desktop. For HP Z2 G4 800 880 G3 G4 G5. Repalce Part Number: L05757-800.

New Power Supply Unit PSU 500W For HP ENVY Desktop - 795-0003UR L05757-800 USA

24VDC 10AMP Power Supply Specifications: Overall dimensions 200mm x 100mm x 38mm H Overall dimensions 7-7/8 x 3-15/16 x 1.5 H Bottom Mounting Holes

Power Supply Unit 24VDC 10A output - 110/220VAC input 1.5A PSU

PC Power Supply Units (PSU)

Power supply unit (computer) - Wikipedia

HP 300W ATX Power Supply

Can I use this Dell server PSU as power supply unit for Christmas lights? : r/WLED