PSU stands for power supply unit. It supplies power to the internal components of a computer, including the motherboard, CPU, graphics card, storage drives and cooling fans.

What size power supply do I need?

The correct PSU size depends on your computer components. Basic office PCs may use 350W to 550W power supplies, while gaming PCs commonly use 650W, 750W or 850W models. High-end gaming and workstation systems may require 1000W or higher.

Is a 750W PSU enough for gaming?

A 750W PSU is suitable for many gaming PCs, especially mid-range to high-performance builds. Always check the recommended PSU requirement for your graphics card before buying.

Is an 850W PSU better than a 750W PSU?

An 850W PSU gives more power headroom for stronger components and future upgrades. A 750W PSU may be enough for many gaming PCs, but an 850W model can be a better choice for higher-performance systems.

What is the difference between modular and non-modular power supplies?

A non-modular PSU has all cables permanently attached. A semi-modular PSU has some removable cables. A fully modular PSU allows you to connect only the cables you need, which helps with cleaner cable management and airflow.

What is an 80 Plus power supply?

An 80 Plus power supply has been tested for efficiency. Common ratings include 80 Plus Bronze, Gold and Platinum. Higher-efficiency models generally waste less power and produce less heat.

Shop for Power Supplies (PSU)

Power Supplies (PSU) for Sale in South Africa

Shop PC power supplies and PSUs at PC International. Choose from reliable desktop power supplies for office PCs, gaming PCs, upgrades and custom builds, including 350W, 450W, 550W, 650W, 750W, 850W and 1000W+ models. Browse non-modular, semi-modular and fully modular power supplies from trusted brands, with options for budget systems, high-performance gaming PCs and modern graphics card builds.

A good PSU is one of the most important components in any computer, helping deliver stable power to your motherboard, processor, graphics card, storage and cooling. Use the filters below to compare wattage, brand, efficiency rating, modular design, price and stock availability.