ATX power supply

ATX power supplies are standard internal power units designed to provide multiple voltage rails and connectors for desktop computers. These products vary by rated wattage, efficiency certification, form factor, and connector set to support motherboards, CPUs, graphics cards and peripherals. Buyers choose ATX power supplies when building or upgrading desktops, replacing a faulty PSU, or ensuring stable power for high-performance components. Models include modular and non-modular designs, different cooling solutions, and protections such as overcurrent and short-circuit safeguards. Technical specifications and compatibility with your case and components are key when selecting an ATX unit.

Use cases of ATX power supply

Common scenarios where ATX power supplies are used:

• System builds and PC upgrades that require appropriate wattage and connectors for new hardware.
• Replacing a failed or noisy PSU to restore system stability and reduce audible noise.
• Providing reliable power for gaming rigs, workstation builds, or home office PCs.
• Testing and troubleshooting PC components where a stable power source is needed.

Types of ATX power supply

Main categories of ATX power supplies available:

• Standard (fixed) PSUs — non-modular units with all cables permanently attached.
• Modular PSUs — allow detaching unused cables to improve airflow and cable management.
• Semi-modular PSUs — combine fixed essential cables with detachable peripheral cables.
• High-efficiency PSUs — models with 80 PLUS certifications (Bronze, Silver, Gold, Platinum, Titanium) offering reduced energy loss.

Key features to consider

Important specifications and features to evaluate:

• Wattage rating — ensure sufficient total and rail-specific power for CPU and GPU demands.
• Efficiency rating — higher 80 PLUS levels reduce heat and electricity use.
• Connectors — required ATX24/20, CPU (4/8-pin), PCIe (6/8-pin), SATA and Molex connectors.
• Form factor and dimensions — compatibility with standard ATX, micro-ATX, or small-form-factor cases.
• Cooling and noise — fan size, hybrid or zero-RPM modes affect acoustics and temperature.
• Protections — OVP, OCP, SCP, OTP and UVP help protect components from electrical faults.

How to choose ATX power supply

Steps to select a suitable ATX power supply:

• Calculate the required wattage by summing component power draws and leaving headroom for peak loads and future upgrades.
• Pick an efficiency level that balances price and long-term energy savings; Gold is a common compromise.
• Confirm connector counts and types match your motherboard, GPU and drives.
• Choose modularity based on cable management needs and case airflow considerations.
• Verify physical dimensions and mounting compatibility with your case.
• Check manufacturer specifications for protections, warranty, and supported operating conditions.

Which power supplies (psu) are the most popular and affordable in 2026?

The full list of popular models at affordable prices is available on this page. In 2026, the following models show high demand and an excellent price-to-quality ratio:

• Spectrum SYSTEM SHIFT 48V Power Supply WLD+40018 for 5.99€
• HiSmart DR-150-24 DIN Rail Power Supply 24V 6.25A 150W for 23.99€
• Power Supply CHIEFTEC APB-500B8-BK ATX 500W with Active PFC and multi-protection for 31.49€
• Power Supply Unit Chieftec Smart GPS-400A8 400 W for 32.99€
• Power Supply Unit Chieftec GPB-500S 500W for 34.99€

Why is it worth buying power supplies (psu) at AiO.lv?

At the AiO.lv online store, you can place an order at a great price with delivery across Latvia — to Riga, Daugavpils, Liepaja, Jurmala, Ventspils, and other cities, as well as throughout Europe. We offer products from leading manufacturers: ANTEC, ASROCK, ADATA, CHIEFTEC, Cisco, CORSAIR, Dell, EUROCASE, HP, Lenovo, PLANET, Siemens, SYNOLOGY, ZALMAN, Asus, Cooler Master, fsp/fortron, GIGABYTE, MSI, OEM. When you shop with us, you get:

• official warranty and guaranteed quality;
• convenient payment options (including installment and credit);
• fast and reliable delivery across Latvia and to any EU country.

FAQ

Where can you find a power supplies (psu) with cheap prices?

You can buy cheaper at the AiO.lv online store. We offer competitive prices and regular discounts, so you always have the chance to find a great deal.

What is the delivery time for power supplies (psu)?

If you place your order today, delivery will take between 1 and 5 business days depending on the chosen method.

How long is the warranty period for power supplies (psu)?

Our store provides an official manufacturer’s warranty ranging from 12 to 36 months, depending on the model and brand. If needed, you can always contact our customer service department or the manufacturer’s authorized service center for support.

Are power supplies (psu) purchasable with leasing?

Yes, if the selected product costs more than €50. You can learn more about installment purchase options and the terms of application on the Payment page.

Can power supplies (psu) be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and throughout Europe. All product prices are shown with VAT included. In certain cases, a 0% VAT rate may apply — for example, when purchasing from other EU countries with a valid VAT number. We issue an invoice immediately after the order is placed, support BIS electronic invoices, and automatically generate all required accounting documents. To complete a purchase for a company, simply select the company profile during checkout.