SFX power supply

SFX power supplies are compact computer power units designed for small form factor (SFF) and mini-ITX cases. They provide the same core functions as standard ATX PSUs—converting AC mains to the DC voltages required by components—but in a smaller footprint to fit tight internal layouts. SFX units are chosen when space is limited, when building compact or portable systems, or when a cleaner interior layout and improved airflow are desired. Many SFX models include modular cabling, 80 PLUS efficiency ratings, and quiet cooling solutions to balance performance and noise. The store offers a range of third-party SFX PSUs suitable for gaming, workstation and home-theater PC builds.

Use cases of SFX power supply

SFX power supplies are used where reduced size or specific case compatibility is required. Common use cases include:

• Small form factor gaming PCs where space is constrained but high power is needed.
• Mini-ITX workstation builds that require reliable, continuous power in a compact chassis.
• Home theater or HTPC systems where low noise and compactness are priorities.
• Compact or portable builds intended for LAN events or frequent transport.
• Systems where improved airflow and cable management benefit from smaller PSU dimensions.

Types of SFX power supply

SFX power supplies come in several variants to suit different needs. Typical types include:

• Standard SFX — the common compact form factor compatible with many SFF cases.
• SFX-L — a slightly longer variant offering larger cooling solutions and sometimes higher wattage.
• Modular and semi-modular SFX — allow detachable cables to reduce clutter and improve airflow.
• 80 PLUS efficiency tiers — models rated Bronze, Silver, Gold, Platinum or Titanium indicating different efficiency levels.

Key features to consider

When selecting an SFX power supply, evaluate the following technical and practical features:

• Wattage rating — choose based on total system power draw plus headroom for peak loads.
• Dimensions and compatibility — confirm the unit fits the target case, including SFX-L differences if applicable.
• Efficiency rating — higher 80 PLUS ratings yield lower energy loss and heat.
• Modularity — fully modular units simplify installation and cable management.
• Connector set — ensure necessary PCIe, CPU, SATA and peripheral connectors are included.
• Cooling and noise — fan size, fan curve and hybrid fan modes affect acoustics and thermal performance.
• Protections and certifications — look for OVP, OCP, OPP, short-circuit protection and manufacturer certifications.

How to choose SFX power supply

Choosing the right SFX power supply involves matching technical requirements and physical constraints. Start by calculating your system’s typical and peak power consumption to determine the required wattage and choose a unit with appropriate headroom. Verify case compatibility for SFX or SFX-L form factors and check mounting points. Prioritize efficiency ratings and reliable protection features for system stability and longevity. Decide on modularity based on how important cable routing and airflow are for your build. Finally, review connector types and lengths to ensure all components can be connected without stretching or obstructing airflow. If uncertain, compare models by wattage, efficiency, noise levels and user reviews to make an informed purchase.

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.