Collection: Desktop PC

Which desktop PC do you actually need?

Most PC builders get stuck because they compare spec sheets instead of workloads. A desktop PC really splits into three tiers, and the differences are mechanical, not just a bigger number on the box.

Entry-level builds pair a six or eight core CPU with a modest GPU (or integrated graphics), 16GB of DDR5 and a 1TB NVMe drive. They handle 1080p gaming, study, office work and light editing without fuss. The trade-offs are smaller GPU dies, less VRAM and cheaper boards with leaner power delivery.

The sweet spot is where most people should land. You get a stronger mid-range graphics card with enough VRAM for 1440p at high settings, 32GB of DDR5 and a board with a properly cooled VRM. Frame rates in games are mostly set by the GPU here, so money spent on the graphics card goes furthest.

Enthusiast builds add bigger GPU dies, wider memory buses, more CPU cores and premium boards. Gains shrink fast. Moving from a sweet-spot GPU to a flagship might add 25 to 40 percent in frame rate for double the price. A top-end CPU often adds almost nothing in games at 1440p or 4K because the GPU is the limit. It only pays off if you render, compile code or run heavy multitasking workloads.

Upgrading and technical nuances

Platform choice matters more than most people think. AMD's AM5 has a long upgrade runway, so you can often drop in a newer CPU later on the same motherboard. Intel's Core Ultra on LGA1851 is a solid platform too, but check how long your chosen chipset is expected to be supported before you plan on upgrading.

For desktop memory, DDR5-6000 with a low CAS latency is the practical sweet spot on AM5, because it lets the memory controller and Infinity Fabric run at a efficient 1:1 ratio. Pushing to 8000 and beyond raises bandwidth but often forces looser timings or a different controller ratio, which can cancel out the gains in games. Corsair Vengeance, Kingston Fury and G.Skill Ripjaws are good mainstream picks. Two sticks are usually more stable than four, since four DIMMs load the memory controller harder and often force lower speeds.

Motherboards differ mostly in VRM quality. A budget board with fewer power stages and thin heatsinks can run hot and throttle a high-core-count CPU under sustained load. Lines like ASUS TUF, MSI Tomahawk and Gigabyte AORUS Elite give you beefier heatsinks, better power stages and more M.2 slots without the cost of flagship boards.

For storage, a PCIe 4.0 SSD such as the Samsung 990 series, Crucial T500 or WD_BLACK SN850X is plenty for most people. PCIe 5.0 drives have higher sequential speeds, but they run hot, often need a heatsink with airflow, and rarely feel faster in everyday use. Random access performance and sustained write speed matter more than headline numbers.

For CPU cooling, the Thermalright Peerless Assassin 120 shows how far a good dual-tower air cooler can go. It is cheap, quiet and competitive with many 240mm liquid coolers. An all-in-one such as the Arctic Liquid Freezer series makes sense for hotter chips or compact airflow layouts. For power, look at the power supply range for ATX 3.1 units with a native 12V-2x6 connector, from lines like Seasonic Focus or Corsair RMx. Good units also handle the brief power spikes that modern GPUs produce.

Practical things to check before buying

Start with physical clearance. Modern GPUs are often three slots thick and over 300mm long, so check your computer case spec for maximum GPU length and for radiator or fan mounting space. Tower coolers can be 155 to 165mm tall, and a case that only allows 150mm will not close its side panel. Large heatsinks can also overhang the first RAM slot, so check clearance if you want tall memory modules.

Power cabling is the next gotcha. The 12V-2x6 connector must be fully seated and shouldn't be bent sharply near the plug, so leave about 35mm of straight run before any bend. If your case is narrow, that can be tight. Also confirm your PSU has enough PCIe or 12V-2x6 connectors for the GPU you want, and avoid cheap adapters if you can. The cables and connectors range has proper extensions and sleeved options.

Airflow is the part people forget. A case with a solid front panel looks neat but can choke intake fans and push GPU temperatures up by several degrees. Mesh fronts and a few good fans from the fans, heatsinks and cooling range help. Fluid dynamic bearing fans last longer and run quieter than basic sleeve bearings.

Finally, think about the rest of the setup. A 1440p 165Hz monitor matches a sweet-spot GPU far better than a 4K panel that a mid-range card can't drive. Check that the board has built-in Wi-Fi, or add a decent adapter or router from networking, including the TP-Link range.

Brands and local warranty

For components, the major names are ASUS, MSI, Gigabyte, Corsair, Seasonic, Samsung, Kingston, G.Skill, Crucial, WD, Thermalright and Arctic. They all have solid track records, but the real difference is how easy it is to claim when something fails.

Buying through an Australian retailer means the warranty is handled locally. Grey imports might save a few dollars, but you can end up shipping parts overseas at your own cost, and the brand may refuse to help. Under Australian Consumer Law you also have rights if a product isn't of acceptable quality, and those are far easier to enforce with a local seller. Power supplies often carry seven to ten years of coverage, which is worth having for a part that can take other components with it when it fails. If you'd rather skip the hassle, pre-built options in computers come with a single warranty point of contact.

Frequently asked questions

How much RAM do I need in a desktop PC today?

32GB of DDR5 is the comfortable sweet spot for gaming plus background apps. 16GB still works for basic use and light gaming, but it can pinch in newer titles. Go to 64GB only for video editing, large projects or virtual machines.

Is PCIe 5.0 storage worth paying for?

For most people, no. Gen 5 drives are faster on paper, but they run hotter and rarely change load times noticeably in games or daily use. A quality PCIe 4.0 drive gives better value, and you can spend the difference on the GPU.

Do I need liquid cooling?

Not usually. A good dual-tower air cooler handles most mid-range and high-end CPUs. Liquid cooling helps with very hot chips, compact cases with limited airflow, or when you want a cleaner look around the socket.

Will my parts fit in any case?

Not always. Check GPU length, cooler height, PSU length and radiator support against the case specs before you buy. Those four measurements cover most fitment problems.

How big a power supply should I buy?

Match it to the GPU and CPU, then leave headroom. A quality 750W to 850W ATX 3.1 unit suits most sweet-spot builds, while flagship GPUs may need 1000W or more. Pick a reputable unit over a bigger, cheaper one.