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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Power Supply
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PC power supplies: advice, choosing the right one and comparisons
Choosing the right power supply or battery determines the longevity and safety of your computer equipment. Our comparisons help you pick a reliable PC power supply, a USB C power bank or a surge protector to keep your devices safe. We also explain how to test and limit the charge of a laptop battery on Windows, or extend its runtime on Linux with TLP. Find our other tips on power and energy for your devices on the Assistouest blog.
How do you choose the right universal charger for your laptop?
Looking for a universal charger for your laptop? Follow our advice to avoid mistakes: power, suitable tips and safety standards.
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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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Broken computer charger: can it be repaired?
Computer charger problem? Learn how to detect the source of the problem and choose the best solution between repair and replacement.
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Testing a laptop battery on Windows
Find out how to easily test the battery status of your Windows laptop with the built-in batteryreport.
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Limiting a laptop’s battery charge on Windows
Activating a partial charge mode extends the life of your notebook's battery, especially if you often work on mains power.
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CPU, GPU and RAM stress tests: Test your PC’s stability with OCCT
Test your Windows PC stability with OCCT by stressing the CPU, GPU and RAM. Detect overheating, errors and instability.
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How do you charge your laptop in the car? Camping / Van
Discover how to charge a laptop while camping, travelling by car or living in a van: 12V inverter, portable power station, solar kit and generator.
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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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The 3 best surge protectors to protect your computer equipment
Which surge protector should you choose? Our top three brings together the best options for protecting a home or professional setup.
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