Collection: DDR4 Desktop RAM

Which DDR4 Desktop RAM do you actually need?

Most PC builders land on DDR4 Desktop RAM for one reason: they already own a DDR4 platform and want to extend its life rather than rebuy a CPU, board and memory. That's a sound call. DDR5 is the standard on AM5 and LGA1851, but a well-specced AM4 or DDR4-capable LGA1700 system still handles gaming and day-to-day work properly. Just know that DDR4 sticks won't physically fit DDR5 slots, so this is purely an upgrade path for existing boards.

Entry-tier kits sit at DDR4-3200 with CL16 to CL22 timings. Under the hood, you get the JEDEC-style baseline: modest bandwidth, looser latency, and basic heatsinks or none at all. It's fine for office work, browsing and light gaming, and it's the cheapest way to get to 16GB or 32GB.

The sweet spot is DDR4-3600 CL16 to CL18. On Ryzen 5000 chips, 3600 lets the Infinity Fabric run 1:1 at 1800MHz, which is the point where latency stops hurting you. Tighter timings matter because real latency is a mix of speed and CAS. A 3200 CL16 kit and a 3600 CL18 kit land within a nanosecond of each other, so check the maths, not just the MHz.

Enthusiast kits (4000MHz and up, CL14 to CL16) usually use hand-picked ICs such as Samsung B-die, with thicker aluminium heatspreaders and better PCB binning. Here the returns fall away fast. Beyond 3600 on most AM4 chips, the fabric clock drops out of sync and you lose what you gained. Intel's DDR4 boards can handle higher speeds, but gaming gains over a tuned 3600 kit are usually in the low single digits.

Upgrading and technical nuances

Capacity usually matters more than speed. 16GB is the floor today, 32GB is the practical sweet spot for gaming plus background apps, and 64GB makes sense for video editing, virtual machines or heavy creative work. Two sticks in dual channel beat one big stick every time, since a single module halves your bandwidth.

Rank and stick count matter too. Two 16GB sticks are easier on the memory controller than four 8GB sticks, which often force lower speeds or looser timings. Dual-rank modules can give a small performance boost in some games but can be harder to overclock than single-rank ones.

Profiles trip people up. Intel boards call them XMP, while AMD boards often label the same thing DOCP or just XMP, depending on the vendor. The kit won't hit its rated speed until you enable the profile in BIOS. Otherwise it defaults to 2133 or 2400MHz. XMP voltage is typically 1.35V against the JEDEC 1.2V, which is fine but worth knowing when you're comparing stability.

For mainstream picks, the Corsair Vengeance LPX, Kingston Fury Beast and G.Skill Ripjaws V are the dependable "buy it and forget it" choices. For premium kits, look at G.Skill Trident Z or Corsair Vengeance RGB for better binning and lighting. Crucial Pro is a no-frills option if you want a clean look and solid compatibility.

Before you buy, check your Motherboards QVL (qualified vendor list) and your CPUs & Processors supported memory speeds. Many boards officially list 3200 and rely on overclocking for anything above. Browse the full Desktop Memory range to compare kits against your board.

Practical things to check before buying

Height is the biggest gotcha. Low-profile kits like Vengeance LPX sit around 31mm tall, while RGB kits can reach 50mm or more. Large air coolers such as the Noctua NH-D15 can overhang the first RAM slot, so you either need a low-profile kit or to raise the fan. Tower coolers like the Thermalright Peerless Assassin 120 are friendlier, but still check the clearance spec. Our CPU Cooling and Fans, Heatsinks & Cooling collections list dimensions, and AIOs like the Arctic Liquid Freezer series avoid the clearance issue entirely.

Airflow matters as well. DDR4 doesn't run especially hot, but tightly packed RGB kits in a poorly ventilated Computer Cases build can creep up during long sessions. A bit of airflow across the DIMMs helps with stability when you're running 1.35V profiles or higher.

Mixing kits is a bad idea. Even two "identical" kits from the same line can use different ICs depending on the production batch. Buy a single kit at your target capacity rather than adding to what you've got, or you'll end up running at the slowest common settings.

Don't spend big on RAM if the rest of the build holds you back. A fast kit won't help a weak Graphics Cards / GPU or a SATA drive when you could grab an NVMe from Solid State Drives (SSD). Also make sure your Power Supplies are healthy before adding other upgrades. RAM draws very little, but an ageing unit is a bad foundation.

Finally, check the motherboard's BIOS version. Older boards sometimes need an update before they handle newer kits or CPUs properly, and you can usually do it without a CPU installed if the board supports flashback.

Brands and local warranty

The reliable names in DDR4 are Corsair, Kingston, G.Skill, Crucial, TeamGroup and Patriot. All of them offer limited lifetime warranties on desktop memory, and RAM failures are rare enough that you'll rarely need to use it, but when you do, it matters.

Buying through an Australian retailer means you're covered by Australian Consumer Law on top of the manufacturer's terms. That means a repair, replacement or refund if the product has a major fault, handled locally rather than by posting a stick overseas and waiting weeks. Grey imports and marketplace sellers with no local presence can leave you stuck, and some brands won't honour warranty without a local invoice.

Keep your invoice and the kit's packaging details (the part number on the label). If a stick does fail, test each module individually in a single slot first, since a dodgy slot or an unstable BIOS setting often gets blamed on the RAM.

Frequently asked questions

Is DDR4 still worth buying for a new build?

Not for a fresh platform. AM5 and LGA1851 boards use DDR5 only. DDR4 makes sense when you're upgrading an existing AM4 or DDR4 LGA1700 system, where adding RAM is far cheaper than replacing the board, CPU and memory together.

How much DDR4 do I need?

16GB covers general use and lighter gaming. 32GB is the comfortable choice for modern games, streaming and multitasking. Go to 64GB only if you edit video, run virtual machines or work with large datasets.

Is 3200MHz or 3600MHz better?

3600MHz CL16 to CL18 is the stronger pick for most Ryzen builds because it syncs well with the fabric clock. On Intel it still helps, but the gap is smaller. If the price difference is small, take the 3600 kit.

Can I mix different DDR4 kits?

You can, but it often forces lower speeds or causes instability, because the timings, ICs and ranks differ. For best results, buy one matched kit at the full capacity you want.

Why isn't my RAM running at its advertised speed?

You probably haven't enabled XMP or DOCP in the BIOS. Without it, the kit runs at a safe default. If it still won't hold the speed, check the motherboard's QVL, update the BIOS, and try two sticks instead of four.