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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.

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Thermaltake Smart BX3 Bronze 550W ATX Power Supply

SKU: PS-SPD-0550NNFABE-3

R976.00Incl. VAT
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750W DeepCool PL750D Non-Modular Power Supply (PSU)

SKU: PL750D

R1,022.00Incl. VAT
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Gigabyte GP-P650G P650G 650W 80 Plus Gold Non-Modular Black Desktop Power Supply

SKU: GP-P650G

R1,057.00Incl. VAT
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650W MSI MAG A650BN ATX Power Supply (PSU)

SKU: MAG A650BN

R1,091.00Incl. VAT
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650W Corsair CX650 Bronze Non-Modular Power Supply (PSU)

SKU: CP-9020278-WW

R1,126.00Incl. VAT
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Antec Atom G850 850W 80 Plus Gold Semi-Modular Black Desktop Power Supply

SKU: ATOM G850

R1,196.00Incl. VAT
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750W CX750 Bronze Non-Modular Power Supply (PSU)

SKU: CP-9020279-WW

R1,241.00Incl. VAT
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Antec CSK 850W Pro PCI-e 5.1 Gen5 80 Plus Bronze Semi-Modular Power Supply

SKU: CSK850 PRO

R1,241.00Incl. VAT
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ASUS Prime 750B 750W Power Supply

SKU: PRIME-750B-BLACK

R1,277.00Incl. VAT
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750W MSI A750BN ATX Power Supply (PSU)

SKU: MAG A750BN PCIE5

R1,505.00Incl. VAT
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FSP VITA BD 850W 80PLUS Bronze ATX3.1 Non-modular Power Supply

SKU: VITA-850BD

R1,505.00Incl. VAT
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850W SP Hydro K PRO ATX Power Supply (PSU)

SKU: HD2-850+

R1,541.00Incl. VAT
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Antec MEGA 850W 80 PLUS Gold ATX3.1 PCIe 5.1 Fully Modular Power Supply

SKU: MEGA850

R1,574.00Incl. VAT
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3-4 days before collection or shipping

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DeepCool PQ850M 850W Fully Modular ATX Power Supply

SKU: R-PQ850G-FD1B-JGEU-V1

R1,587.00Incl. VAT
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Cooler MasterMWE 750W Gold Power Supply

SKU: MPE-7502-ACAAG-EU

R1,598.00Incl. VAT
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3-4 days before collection or shipping

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FSP Vita GM 750W Gold Fully Modular Power Supply unit

SKU: PPA7507900

R1,632.00Incl. VAT

Power Supply Buying Guide South Africa

Choosing the right power supply is important for system stability, upgrade flexibility and long-term reliability. A good PSU helps deliver stable power to your motherboard, processor, graphics card, storage drives and cooling fans.

At PC International, you can shop power supplies and PSUs for office PCs, gaming PCs, custom builds, workstation systems and desktop upgrades. Browse by wattage, brand, efficiency rating, modular design, form factor and price to find the correct PSU for your computer.

Click here for more information about these products

How Much Power Supply Wattage Do You Need?

The right PSU wattage depends on your processor, graphics card, storage, cooling setup and future upgrade plans. Basic office computers usually need less power, while gaming PCs and workstation builds require stronger power supplies.

As a general guide, basic office and home PCs often use 350W to 550W power supplies. Entry-level gaming PCs commonly use 550W to 650W models, while mid-range gaming PCs often use 650W to 750W PSUs. High-performance gaming PCs usually need 750W to 850W, and high-end gaming or workstation builds may require 1000W or higher.

Always check the recommended PSU requirement for your graphics card before buying, especially if you are building or upgrading a gaming PC.

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Modular vs Non-Modular Power Supplies

Power supplies are available in non-modular, semi-modular and fully modular designs. The best option depends on your budget, case size and how clean you want your PC build to look.

A non-modular PSU comes with all cables permanently attached and is usually the most affordable option. A semi-modular power supply has some fixed cables and some removable cables. A fully modular PSU allows you to connect only the cables you need, making it ideal for cleaner cable management, better airflow and premium PC builds.

For budget office PCs, a non-modular PSU can be suitable. For gaming PCs and custom builds, semi-modular or fully modular power supplies are often preferred.

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80 Plus Bronze, Gold and Platinum Power Supplies

Efficiency ratings such as 80 Plus Bronze, 80 Plus Gold and 80 Plus Platinum help indicate how efficiently a PSU converts power. Higher-efficiency power supplies are popular for gaming PCs, workstations and systems that run for long hours.

80 Plus Bronze power supplies are common for budget and mid-range systems. 80 Plus Gold PSUs are popular for gaming PCs and higher-quality builds because they offer a good balance of efficiency, performance and value. 80 Plus Platinum models are usually aimed at premium systems where efficiency and lower wasted power are important.

Efficiency is important, but it should not be the only factor. Brand quality, wattage, connector support, protection features and warranty should also be considered when choosing a PSU.

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Choosing a PSU for a Gaming PC

Gaming PCs need a reliable power supply, especially when using a dedicated graphics card. The GPU is often the biggest factor when deciding which PSU wattage to buy.

For many modern gaming PCs, 650W, 750W and 850W power supplies are popular choices. A 650W PSU may suit entry to mid-range gaming systems, while 750W and 850W models are better suited to stronger graphics cards and future upgrades. High-end systems may require 1000W or higher.

When choosing a gaming PSU, check the graphics card power requirement, PCIe power connectors, CPU power draw, cooling setup and upgrade plans. For newer graphics card builds, also check whether you need modern GPU power connector support.

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Power Supply Compatibility

Before buying a PSU, make sure it is compatible with your computer case, motherboard, graphics card and other internal components.

Most standard desktop PCs use an ATX power supply, but smaller cases may require compact PSU formats such as SFX. You should also check that the PSU has the correct motherboard power connector, CPU power connector, graphics card connectors and enough SATA power connectors for your storage drives.

If you are replacing a faulty desktop power supply, match the form factor, wattage and connector requirements before installing the new unit.

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Power Supply FAQ

What does PSU mean?

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.

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