Power supplies

Just dropped in a new GPU, boot it up, and everything’s sweet… until it suddenly shuts down mid-game? Or, maybe your fans start howling the second you push it. That’s usually your PC power supply throwing in the towel.

The fix? A good PSU with the grunt to keep your computer powering through without a hitch. If you’re after a workstation or gaming PC, you’ll find an online-only range of PSUs right here at JB Marketplace. Big-name brands, serious variety, plus the gear to get your rig running exactly how it should.

The PSU or power supply unit is the muscle that pushes clean, stable power from the wall to every part of your rig. A solid PSU delivers that juice through the right connector for each component. Your motherboard gets an EPS cable for the CPU, drives hook in with SATA, and the GPU gets its own PCIe line. Inside, quality capacitors keep things smooth so your system stays stable when it’s working hard.

Think of wattage as the fuel tank for your rig. The bigger the demands, the more fuel you need to keep them running full tilt. Push a high-end GPU with a top-tier CPU, and you’ll chew through power fast. Run lighter gear, and you won’t need nearly as much.

The trick is matching your PSU to the parts you’ve got now, plus a little headroom for the gear you’ll add later.

Here’s what you’ll find across the JB Marketplace range for different types of builds:

• Casual and Everyday PCs – For email, streaming, and day-to-day use, 450–550W is plenty. Enough to keep basic motherboards, a single storage drive, and entry-level graphics cards running smoothly without wasting power.
• Work and Productivity Rigs – If you’re running multiple screens, apps all day, and a steady mid-range Intel or AMD chip, aim for 650W power supply units. This covers your main setup, a couple of hard drives, and any small add-ons.
• Creator and Editing Builds – Big photo files, 4K video timelines, or 3D rendering eat power. Go for 650W to 850W units to leave room for stronger GPUs, faster processors, and high-speed storage like SSD banks without stressing the PSU.
• Gaming PCs – High frame rates and maxed-out settings need serious juice. Start at 750W and push past 1000W if you’re running a beastly GPU, overclocked processor, and multiple drives. That way, you’re ready for the latest AAA titles without your PSU flinching.

It does. If you’ve ever felt a laptop heat up under load, you know why efficiency counts. Higher efficiency means your PSU wastes less power, runs cooler, and keeps your rig stable for longer.  Here’s a quick look at what the efficiency ratings mean:

• 80 Plus Bronze – Reliable and budget-friendly. Good for office rigs and lighter gaming.
• 80 Plus Gold – The go-to. Delivers steady performance for gaming and creator builds.
• Platinum and Titanium – Premium gear for serious rigs. Top parts, cooler temps, and long-term stability.

Some even throw in RGB lighting with smart cooling, so you get performance and style in one. Less heat also means low noise. So, yes, no hairdryer sound when your system’s under load!

Think about how you build. Are you the kind who plans every part down to the last screw, or do you just want to plug in and go? The type of PSU you pick decides how neat your rig looks, how cool it runs, and how easy it’ll be to add peripherals later.

• Fully Modular Power Supply – Every cable detaches. Perfect for clean, showcase builds or custom loops, and a favourite for RGB lovers running gear from brands like CoolerMaster. Best choice for airflow, upgrades, and cable management.
• Semi-Modular – The essentials stay fixed, like the motherboard and CPU, while extras can be added or removed as needed. Solid balance of flexibility and price, without going all-in on a full modular unit.
• Non-Modular – All cables are fixed. The cheapest option and still reliable, but you’ll work harder to keep things tidy. An adapter can help if you’re mixing in older parts or extra connections.

Building in a roomy mid-tower or full-tower PC case? You’re probably going with an ATX power supply. It’s the go-to size for most PC cases, giving you plenty of connectors, strong airflow, and space to power GPUs, stacks of drives, and high-end parts. Think clean, reliable juice for serious rigs from brands like Antec, NZXT, and Lian Li. Go for the ATX 3.0 or ATX 3.1 units for faster, more efficient power delivery.

Tight on space? SFX is your friend. Built for small cases like Mini ITX setups, these units squeeze the same essential performance into a compact form factor. Perfect if you want a powerful gaming or creator build without a massive case eating up your desk.

Serious gaming rigs need serious power. Go for PCIe 5.0 or PCIe 5.1 to handle the latest NVIDIA GeForce RTX cards, with clean delivery for overclocked CPUs and high-refresh displays. Pair it with builds rocking Asus ROG and MSI Mag gear for rock-solid compatibility in high-end setups.

Future-proofing is key too. A solid unit with Gen 5.0 support, smart cooling, and maybe some RGB will keep your rig running cool, looking sharp, and ready for whatever next-gen throws at it.

Your rig’s only as strong as the power running it. That’s why JB Marketplace features PSUs built to keep you gaming, creating, and smashing through whatever’s next. We’re talking heavy hitters from big names like Corsair, Gigabyte, Gamemax, SilverStone, DeepCool, FSP, Thermaltake Toughpower, and more, ready to drop into your build and go to work.

Browse the full range online. From all-night gaming to deadline-crunching edits, there’s a power supply unit here that’ll keep your system cool, stable, and running hard.