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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. One thing we appreciated about the design of the UGREEN enclosure is the easy, tool-free installation. The outer shell of the case is hollow, and you can slide it off with a little effort. Once you’ve pulled out the inner case, you install your M.2 drive in the enclosure. It’s large enough to fit any standard-sized NVMe drive: 2230, 2242, 2260, and 2280 will all fit. We've already mentioned one you know—SSD. It stands for "solid-state drive," a storage drive made up of flash memory in modules called NANDs and governed by a controller chip. (The name NAND comes from a type of logic gate in Boolean algebra; we'll try to explain terms as we go along, but if you need a refresher in SSD lingo see our rundown of 20 terms you need to know.) Unfortunately, SSD shopping has been complicated in recent years by the emergence of three new technologies: M.2, PCI Express (abbreviated PCIe), and NVMe. All three are centered around making SSDs smaller or faster. They also make buying a solid-state drive more challenging than ever. Why did SSDs take so long to get so small? Actually, from a strict manufacturing viewpoint, they never needed to 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.
The first generation of M.2 PCI Express SSDs made use of a PCI Express x2 interface with throughput higher than SATA 3.0, but not enormously so. That's changed. Today's mainstream M.2 drives support PCI Express 3.0 x4 (four lanes of bandwidth), working alongside a technology called Non-Volatile Memory Express (NVMe). The idea behind NVMe is to accelerate performance further, especially with hardy workloads. An M.2 slot on an MSI AMD-based motherboard, showing multiple mounting points Ready to shop? Not quite: Increasingly, mainstream drives now cite support for PCI Express 4.0 as opposed to 3.0. We've tested our share of M.2 SSDs that support the upgraded interface, and they are fast indeed. How much you'll be able to tell the difference, though, comes down to what you do with your PC. The UGREEN M.2 NVMe SSD Enclosure is an aluminum and silicone enclosure that allows for tool-free installation. Also, make sure that if your system supports and you're shopping for an NVMe drive, any PCI Express drive you're considering is specifically an NVMe model. Merely using the PCI Express bus is not necessarily a guarantee of that; PCIe M.2 SSDs existed before NVMe, and though all current models support NVMe, some oldies are still on the market. Today's mainstream solid-state drives are PCI Express 3.0 and 4.0 x4 NVMe M.2 devices, and they leave the fastest SATA-based drives in the dust. 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.)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.
The data transfer speed will depend on what type of drive you’re using. For NVMe drives, you get a full 10Gbps maximum speed. If you’re using a SATA drive, this will top out at 6Gbps. You’ll also be limited to 2TB of drive capacity. That said, you get everything you need to get started. Along with the enclosure, there’s a pair of 15.7” USB Type-C to Type-C and Type-C to Type-A cables. Best Durability: StarTech.com USB-C M.2 NVMe PCIe SSD Enclosure The USB port supports the USB 3.2 data transfer standard. This allows you to read and write files at a rate of up to 10Gbps. The enclosure itself will support up to a 8TB drive. That’s a larger capacities than most enclosures will allow. A pair of 12-inch cables are included for connecting to your computer or other device. Both are male-to-male, and one is USB Type-C to Type-C, while the other is Type-C to Type-A. The StarTech.com USB-C M.2 NVMe PCIe SSD Enclosure is drop-proof and waterproof for extreme durability. 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. Also, as we mentioned, realize that a few laptops solder their SSDs directly to the mainboard to save space, so a drive upgrade may not be possible. Note, too, that upgrading a laptop to a new SSD may violate the terms of any existing warranty.Although M.2 is commonly referred to as an interface, that's not the whole story. M.2 is also a shape or physical form factor, and governs the keying that lets a drive fit onto a motherboard. Depending on what you need, any one of these M.2 SSD enclosures could be the best choice. But what sets one apart from another? Here’s what we’ve learned about each of these enclosures. 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. The T700 is for gamers, creatives, and professionals seeking the ultimate in solid-state drive performance that today only a Gen 5 SSD offers. Just know that being able to run a PCI Express 5.0 SSD at peak speeds can require a considerable additional hardware investment. You must be willing to buy a recent desktop with the hardware to support SSDs built on the PCIe 5.0 standard, upgrade an existing recent rig, or build one from scratch. By making such an investment and having the T700 serve as its brains, though, you're future-proofing your entire setup. We started out our list with the UGREEN M.2 NVMe SSD Enclosure. This enclosure accepts any length NVMe SSD, and installation takes just a few moments. That’s convenient if you intend to swap different drives in and out of your enclosure. We also appreciated the large, 8TB maximum capacity, which is great for archives.
The SK Hynix Platinum P41 is a worthy choice for anyone looking to buy a high-performance PCI Express 4.0 NVMe SSD without breaking the bank. It blew away several of our benchmark records. The P41 provides AES hardware-based encryption and a clone utility tool as well as SSD management software. Just be forewarned that with its blistering speed, you will want to add a heatsink, the one item of note that it is missing. In recent years, M.2 drive technology has been changing how we think about storage. Traditional storage has either been internal or external. Yes, you can swap out a traditional 2.5” or 3.5” internal drive if you want to. But there are multiple steps involved. An M.2 drive is a drop-in solution that can be implemented not just in full-sized PCs but in portable systems. 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. Though it can't quite match the gaming prowess of some of the latest generation of PCIe 4.0 speedsters, the SSD 990 Pro With Heatsink still offers respectable gaming performance while being a thoroughbred workhorse for creative tasks. It's an appealing choice and a worthy upgrade from the SSD 980 Pro. 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.Of course, these are just the basics. To truly understand these enclosures, we’re going to have to take a much closer look. Once we’ve given them a thorough evaluation, we’ll know enough to deliver a verdict. Let’s get started! Best Overall: UGREEN M.2 NVMe SSD Enclosure The data 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.) Most M.2 drives aren't exactly pretty; they look like bare circuit boards with silicon chips grafted onto them. Some may be topped by a heat spreader or heatsink (usually an array of metal fins) that is equal parts practical and decorative. The most important thing to know about M.2, though, is what it is and what it isn't. 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 the bus or 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.
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