Collection: M.2 NVMe SSD

Which M.2 NVMe SSD do you actually need?

Most PC builders get hung up on the headline sequential speed on the box, when what you feel day to day is random read latency, sustained write behaviour and how the drive acts once it's mostly full. Entry-tier drives, like the Crucial P310, Kingston NV3 or WD_BLACK SN7100 class, are typically PCIe 4.0 x4 and often DRAM-less. They borrow a slice of system RAM through Host Memory Buffer to hold the mapping table, which works well for gaming and general use, but gets sluggish under heavy mixed workloads. Some budget models also use QLC NAND, which stores four bits per cell. That makes it cheaper, but it writes slowly once the pseudo-SLC cache fills.

The sweet spot is a TLC drive with a proper controller, such as the Samsung 990 EVO Plus, WD_BLACK SN850X, Crucial T500 or Lexar NM790. TLC holds up better on long sustained writes, and a good controller keeps latency consistent. This is where most gaming and general-use builds should land. At the top end, PCIe 5.0 drives like the Crucial T705 or Corsair MP700 line push sequential reads past 12,000 MB/s, but they run hot and need serious heatsinks. Loading a game, or a typical Windows task, barely changes between a good Gen4 drive and a Gen5 one, because those loads are dominated by small random reads and CPU decompression. Diminishing returns kick in hard once you pass a quality Gen4 TLC drive, unless you're moving huge files daily.

Upgrading and technical nuances

Check your motherboard before anything else. Current Motherboards on AM5 and LGA1851 usually give you one Gen5 M.2 slot wired straight to the CPU, plus several Gen4 slots, some running off the chipset. Chipset slots share bandwidth with SATA ports, USB and networking, so a drive in the wrong slot can lose a SATA port or drop speed. The manual's lane-sharing table is worth five minutes.

Older boards add a few traps. Some only support PCIe 3.0, and a Gen4 drive will still work but be capped at roughly 3,500 MB/s. That's fine for most people, so there's no need to panic. Also confirm the slot is M.2 M-key with NVMe support. Some older M.2 slots are SATA only, and SATA M.2 drives look nearly identical with a different notch layout.

For capacity, 1TB is the realistic minimum now, because modern game installs are enormous. 2TB is the comfortable point, and price per gigabyte is usually best there. Drives also slow down and wear faster when nearly full, since there's less free space for the controller to use as cache. For handheld or console-style uses, a PS5 needs a Gen4 drive with a specific heatsink height, so check the console's requirements rather than guessing.

If you're building a whole system, pair your drive choice with your CPUs & Processors and Graphics Cards / GPU rather than overspending on storage. DirectStorage titles benefit from fast NVMe, but a solid Gen4 drive covers it comfortably. Browse the full Solid State Drives (SSD) range to compare options side by side.

Practical things to check before buying

Start with form factor. Most desktop drives are 2280, meaning 22mm wide and 80mm long. Some boards also take 2230 or 22110 sizes. Single-sided drives are slimmer, which matters under tight motherboard heatsinks and in laptops or mini PCs. Double-sided 4TB drives can foul low-profile covers.

Thermals matter more than people think. Gen4 drives generally cope fine with the motherboard's bundled heatsink. Gen5 drives can throttle hard without one, as controllers push past 80°C under sustained writes. A thicker aluminium heatsink adds thermal mass, and a fin stack or heatpipe design moves heat into the airflow. Those only work if your Computer Cases actually deliver some airflow across the board. If a big GPU sits directly over the primary M.2 slot, it traps heat and can block access to the slot altogether. Often the top slot runs hottest for this reason, so using a chipset-fed slot lower down can be smarter for a Gen4 drive.

Mind clearance too. Chunky tower coolers or large AIO pump blocks from CPU Cooling can overhang the first slot. Install the drive before you mount the cooler, or you'll be unscrewing everything later. Good case airflow from quality Fans, Heatsinks & Cooling products also keeps drive temperatures in check.

Power is rarely an issue, since M.2 drives draw from the slot, but a stable supply helps. Sudden power loss on cheap units can corrupt data, so choose a decent unit from our Power Supplies or ATX Power Supply ranges. If you need to carry over old data, an M.2 enclosure or a cable from Cables & Connectors can make cloning simple.

Finally, check endurance ratings (TBW) and whether a heatsink is included. Some "heatsink" versions of drives cost more, and that extra might be better spent on a cheaper bare drive plus the board's own cover.

Brands and local warranty

Samsung, Western Digital (WD_BLACK), Crucial, Kingston, Corsair, Lexar, Seagate and Solidigm are the names I'd trust. Samsung and WD make their own NAND and controllers, which tends to mean predictable performance. Crucial (Micron) does the same. Kingston, Corsair and others sometimes change components between production batches, so check recent reviews for the exact model.

Local warranty matters more than most people realise. Drives hold your data, and failures are rare but not impossible. A genuine Australian warranty means you deal with a local RMA process under Australian Consumer Law, not a grey-import seller overseas. Warranties are typically three to five years, often tied to TBW. Buying from an Australian retailer means a faulty drive gets swapped without international shipping or weeks of waiting. Also back up anything important, because no warranty restores your files.

Frequently asked questions

Is a PCIe 5.0 M.2 NVMe SSD worth it for gaming?

Not usually. Game load times are limited by CPU decompression and small random reads, so a good Gen4 TLC drive feels much the same. Gen5 makes sense for large video or dataset work, and only if you can cool it properly.

How much capacity should I buy?

Aim for 2TB if the budget allows. Large game libraries fill 1TB quickly, and drives with more free space stay faster and last longer.

Will an M.2 NVMe SSD work in my older motherboard?

If it has an M.2 slot with NVMe support, yes. A Gen4 drive in a Gen3 slot runs at Gen3 speeds. Check the manual to make sure the slot isn't SATA only.

Do I need a heatsink?

Gen4 drives usually do fine with a motherboard heatsink or even a bare drive in good airflow. Gen5 drives really need one, plus case airflow.

Is a DRAM-less drive okay?

For gaming and everyday use, yes, especially on modern platforms with plenty of RAM for Host Memory Buffer. For heavy mixed workloads or constant large writes, a drive with onboard DRAM stays more consistent.