Power Supplies

Find the Right Power Supply for Your PC Build

The right power supply starts with your complete PC specification, not a generic wattage label. Check the PSU recommendation for your graphics card, then account for the processor, motherboard, storage, cooling and any upgrades you plan to make.

A 650W PSU, 750W PSU or 850W PSU can all be suitable when they match the hardware. Rated wattage is the capacity the unit is designed to provide. It does not mean an 850W computer PSU constantly draws 850W from the wall.

Match Your PSU to the Case and Components

Compatibility goes beyond wattage. A PSU also needs to suit the case, the power demands of components such as modern processors and graphics cards, and the connector requirements of the build.

ATX, SFX & SFX-L Dimensions

ATX power supplies suit many standard desktop cases, while SFX and SFX-L units are built for more compact systems. Laptop Outlet’s range includes ATX alongside SFX and SFX-L PSU models, subject to availability.

Check the supported form factor, exact PSU length and cable clearance against your case specification. This is particularly important with gaming PC cases, where radiators, drive cages and cable-routing space can affect PSU fit.

Motherboard, CPU & Graphics Card Connections

Your build may need a 24-pin motherboard cable, one or more CPU EPS connectors, SATA power and specific PCIe connections for the graphics card. Check both connector quantity and cable length before ordering, particularly with gaming motherboards that may require additional CPU power connections.

When replacing a PSU in a prebuilt desktop, confirm whether the motherboard or other components use proprietary power connections before fitting a standard PC power supply.

ATX 3.0, ATX 3.1 & GPU Power Cables

ATX 3.0 and ATX 3.1 PSUs are designed around newer system power demands, including short-duration power excursions from modern components. However, the standard alone does not confirm every cable your build requires.

Check the exact PSU and graphics card for compatible connections. Depending on the hardware, this may mean 6+2-pin PCIe cables, 12VHPWR or the newer 12V-2x6 connection. Check these requirements carefully when pairing a PSU with advanced graphics cards.

Bronze, Gold or Platinum: Understanding PSU Efficiency

80 PLUS certification measures power conversion efficiency at defined load levels. Bronze, Gold and Platinum represent progressively stricter efficiency requirements, and Laptop Outlet lists power supply units across these tiers.

An 80 PLUS Gold PSU can waste less energy than a lower-rated model under comparable conditions, while Platinum meets higher efficiency thresholds. The certification does not by itself guarantee build quality, electrical protection, low noise or reliability, so compare it with the full specification and warranty.

Fully Modular, Semi-Modular or Fixed Cables?

A fully modular PSU lets you connect only the cables you need, making installation and cable management easier. Semi-modular designs keep some essential cables attached, while fixed-cable units have every lead permanently connected.

Modularity does not automatically improve cooling because airflow depends on the whole case layout. Replacement modular cables must also be approved for the exact PSU model, as pinouts can differ even when connectors look similar.

Fan Noise, Protection Features & Warranty

Fan behaviour varies by model and load. Some PSUs use temperature-controlled fans, while selected units offer zero-RPM or semi-passive modes at lower loads, so check the individual specification.

Also compare documented safeguards such as over-voltage, over-current, over-power, over-temperature, short-circuit and under-voltage protection where listed. Protection features and warranty terms vary by model, and a PSU should not be assumed to protect against every external power event.

Compare PC Power Supplies Across the Range

Compare models from Seasonic, ASUS, MSI, Gigabyte, ASRock, GameMax and DeepCool, alongside other available brands. Look beyond the badge and assess wattage, form factor, modularity, efficiency, dimensions, GPU connections and warranty.

This makes it easier to narrow down a gaming PC power supply or everyday computer PSU that works with your current hardware and leaves appropriate room for planned upgrades.

Power Your Next Build with Laptop Outlet

Find the right power supply for your PC build or upgrade at Laptop Outlet, with options covering different wattages, form factors and efficiency ratings. If you are replacing several components, you can also compare compatible PC hardware for the rest of your setup.

Check each product page for current availability, delivery information and warranty details. You can also spread the cost on eligible orders using PayPal Credit, PayPal Pay in 3 or Klarna, helping you choose the compatible PSU your system needs.