How to test a desktop PC’s ATX power supply (PSU) with a multimeter?
Learn how to test your ATX power supply with a paper clip or multimeter, measure the 12 V, 5 V and 3.3 V rails, and diagnose a faulty PSU.
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PC Power Supply (PSU)
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Guides to choose and test a PC power supply
How to choose, configure and test a PC power supply, including PSU standards and safe ATX checks.
If a cable is coming out of your PC power supply without being connected, switch to a modular one
Is an unused cable hanging inside your PC? That is normal with a non-modular power supply. Here is what to do and why going modular can make a difference.
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80 PLUS Ruby: the new certification for power supply units (PSUs) for data centres
What is 80 PLUS Ruby, and why does it go beyond Titanium? Discover what this certification changes for data centers, cloud infrastructure, and AI.
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How to build your first gaming PC yourself, step by step
Assemble your gaming PC with our ultimate guide! Discover an unrivalled gaming experience.
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The best PC power supplies in 2026 – how to choose the right PSU
Find the ideal power supply for your gaming or professional configuration! Selection of the most powerful power supplies with certification and cooling.
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