Samsung 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology (MZ-V7S2T0B/AM)

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If you're a custom PC builder with RGB-lighting fever, and have RGB-ified just about every inch and corner of your system, perk up: ADATA has brought pretty lights to the internal SSD final frontier. The XPG Spectrix S40G is the most flamboyant NVMe drive we've seen to date. With the S40G's fine 4K write speeds, top-notch sequential-read speeds, and respectable durability rating, ADATA makes having a top-of-the line, over-the-top SSD affordable and fun, in one fell swoop. Who It's For Why did SSDs take so long to get so small? Actually, from a strict manufacturing viewpoint, they never neededto be that big in the first place. Classic 2.5-inch SSDs have a lot of dead space inside, as memory chips are much smaller than rotating drive mechanisms, but they were designed to fit into existing bays to replace hard drives. In the move from bulky desktops to ultra-slim laptops and tablets, one thing came clear: That fatter kind of drive would have to go. An M.2 drive reduces an SSD to its essentials: just a strip of a circuit board studded with silicon, much leaner and easier to fit into tight spaces. You can use these PCIe 4.0-based SSDs in PCIe 3.0-only systems, but they'll just dial down to PCIe 3.0 speeds. So should you opt for one? If you'll be assembling or upgrading a late-model AMD or Intel PC with the right chipset, by all means. Hardcore gamers and content creators working on today's newer PCs will stand to gain the most. If you have a PCIe 4.0-capable slot for one, get one; otherwise, 3.0 will likely do you fine.

NVMe Drives at Overclockers UK - OcUK SSDs - PCIe 4.0 NVMe Drives at Overclockers UK - OcUK

In practice, all of today's PC builder- or upgrader-minded M.2 drives and slots are 22mm wide, so you can expect this number to start with 22. The most common lengths are 80mm (M.2 Type-2280) and 60mm (M.2 Type-2260). Drives as short as 30mm (M.2 Type-2230) or as long as 110mm (M.2 Type-22110) do exist, however. Why the differences in length? The longer the drive's PCB (printed circuit board), the more surface area it has to hold memory chips. In my early career, I worked as an editor of scholarly science books, and as an editor of "Dummies"-style computer guidebooks for Brady Books (now, BradyGames). I'm a lifetime New Yorker, a graduate of New York University's journalism program, and a member of Phi Beta Kappa. Many of today's premium laptops can make use of PCI Express M.2 drives. (Important: Some, like the latest Apple MacBooks, have PCI Express drives soldered, in not-upgradable fashion, to the laptop's mainboard, so "PCI Express SSD" doesn't necessarily imply "removable M.2 SSD module.") As mentioned, almost all new desktop motherboards have M.2 slots, most of which support PCI Express drives.

Until the last few years, the typical SSD was a little slab, designed to fit into the same space or drive bay inside a PC as a spinning hard drive. You can still find SSDs in this form factor, known as 2.5-inch drives, but times have changed. As we discuss in our parallel roundup, The Best M.2 Solid-State Drives, M.2 drives are differentiated by a four- or five-digit number listed in their names or specifications. The number is a measurement in millimeters, with the first two digits being the drive's width and the remaining two or three digits telling you how long it is. Now let's reiterate an important point: You may know an M.2 solid-state drive's length and capacity, but that doesn't tell you about thebusor interface it makes use of. That detail is vital to know—just as important as making sure the drive physically fits in the space you have. Although M.2 is commonly referred to as aninterface, that's not the whole story. M.2 is also ashapeorphysical form factor, and governs the keying that lets a drive fit onto a motherboard. One other form that NVMe drives take, the U.2 drive, is confined at the moment to just a handful of SSDs. Its physical interface is much more common in servers than consumer PCs. A few high-end motherboards may have onboard U.2 ports, but most will require a specialized U.2 adapter that plugs into an M.2 slot.

NVMe SSDs for gaming in 2023 | PC Gamer Best NVMe SSDs for gaming in 2023 | PC Gamer

WATCH THAT BOOT.If your desktop is getting a PCI Express/NVMe drive for the first time, verify with the motherboard or PC maker that the drive will be bootable. It's unlikely, but a BIOS upgrade may be required to get you there. (This is an issue with older motherboards, not current ones.) SATA-based M.2 SSDs are all well and good, but mostly restricted to economy models these days—PCI Express is where the cutting-edge speed is. Your system specifically needs an M.2 slot that supports PCI Express to use these drives; some desktop motherboard slots support both kinds. A given laptop might support only M.2 SSDs that use the SATA bus, which limits what you can do in terms of upgrades. The only reason you'd upgrade in that situation would be to boost the available storage capacity.

Thedata bus, or pathway, over which your data travels to and from an M.2 drive is a whole other matter, which is where PCI Express and NVMe come in. We'll get to the significance of NVMe in a moment; first, let's discuss the key physical traits of an M.2 drive that you need to understand. (The video below is a good primer.) Some PCI Express M.2 SSDs can run hot under sustained use, so having the M.2 module mounted on a vertical card can also mean better ventilation, and in theory less throttling due to heat. That said, these drives are so fast that under most normal use they finish data transfers before heat can become a major issue.