What is a Power Supply Unit (PSU)?

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

240W Watt Desktop Power Supply Unit PSU for Dell Optiplex 390 790 990 960 7010 9010 3010 Small Form Factor System SFF H240AS-00 H240AS-01 D240ES-00 DPS-240WB AC240AS-00 H240ES-00 L240AS-00 AC240ES-00 : Electronics

Anatomy of a Power Supply Unit (PSU)

Anatomy of a Power Supply Unit (PSU)

300W L300PM-00 X9GWG Power Supply Unit PSU for Dell Vostro 200 220 230 260 420 Inspiron518 519 530 545 Precision T1500 T1600 T1650 Optiplex 3010 7010 9010 MPCF0 0VWX8 5W52M 57KJR N6H3C 6R89K MiniTower : Electronics

HP 0950-4270 - 150W Universal Power Supply Unit (PSU) - CPU Medics

Intellinet 508728 Industrial DIN-Rail Mount Power Supply Unit - 120 W

QNAP PWR-PSU-1200W-DT01 Power Supply Unit Grey

Ensure uninterrupted power supply for your QNAP NAS enclosures with the QNAP 550W Power Supply Unit. Designed by QNAP Systems, this modular power supply unit delivers reliable and efficient performance, keeping your data safe and secure. Upgrade your power solution today!.