M.2 drive length isn't always an indicator of drive capacity, but therearelimits to NAND-chip density and how many memory modules engineers can stuff onto a PCB of a given size. As a result, most of the M.2 drives we've seen to date have topped out at 2TB, though you can find a few 4TB and 8TB models at lofty prices. The typical capacity waypoints are as follows: Yes, faster drives will be released to the market near the end of the year, but for now, the T700's 12.4 / 11.8 GB/s of throughput leads the market, not to mention the beastly up to 1.5 million random read/write IOPS that remains uncontested by any SSD on the market. The Crucial T700 can take a beating, too: The T700 doesn't lose as much steam as other drives during heavy sustained workloads, making it a suitable drive for even the heaviest of workloads, like workstation-class video editing.

In many other regards, this X model is a dead ringer for the SN850. We’re talking four lanes of PCIe Gen 4 connectivity in the now ubiquitous M.2 2280 form factor. But the 1TB model reviewed here is now the entry-level option. There’s no longer a 512GB model. What’s more, WD’s in-house controller chip, provided by compatriot SanDisk, has been revised, though detailed specifics aren't provided. SATA is slowest: SATA isn't as fast as an M.2 PCIe or a PCIe add-in card, but the majority of desktops and many laptops support 2.5-inch SATA drives, and many doing typical mainstream tasks users won't notice the difference between a good recent SATA drive and a faster PCIe model. When it comes to the real-world tests, we time how long it takes to copy a 30GB game install across the drive and use PCMark10 and Final Fantasy XIV: Shadowbringers, which includes a level load test. A new suite of features comes with the SN850X including Predictive Loading, Overhead Balancing and Adaptive Thermal Management 5. Well, it's got it all if the context is PCIe 4.0 drives. There is a new generation of PCIe 5.0 drives but they're a bit over the top for most gamers right now. PCIe Gen 4 is not only where it's at, it's probably also the limit of your PC or laptop's capabilities.Of course, SK Hynix isn't new to this space, but the new P41 is arguably the brand's first tilt at a truly high-end M.2 drive. The old SK Hynix Gold P31 was a bit of a clunky old thing, limited as it was to the PCIe 3.0 interface and a controller chip with a mere four memory channels. The new Platinum P41? It's got it all.

This isn't a slow SSD, either. It's right up there with the very best PCIe Gen4 drives today at 7,400MB/s read and 6,500MB/s write. In our own testing, we measured it at 7,106MB/s seq. read and 6,504MB/s seq. Write—very nearly bang on what's advertised, which is really great. Finally, on the speeds and feeds, this 2TB drive is rated at 1,200TB for write endurance. As it happens, that's precisely the same as the new Samsung 990 Pro 2TB. But it's also far from some other competing M.2 SSDs. Early examples of the latest generation of M.2 drives, using the PCI Express 5.0 bus, also come in the Type-2280 format, but it's expected that some PCIe 5.0 slots on new motherboards will be built to support the larger Type-25110 format (25mm by 110mm), so we may well see PCIe 5.0 SSDs with these dimensions as well. PCIe 5 drives are capable of tremendous throughput speeds (in excess of 10,000MBps) that should generate abundant heat, and the SSDs we have seen so far come with substantial built-in heatsinks.The AHCI (Advanced Host Controller Interface) command protocol was designed for much slower media (i.e., spinning magnetic disks). AHCI is inefficient with modern SSDs, so a new standard was developed: NVMHCI (Non-Volatile Memory Host Controller Interface). Combine NVMHCI with a fast PCIe interface, and you have NVMe, Non-Volatile Memory Express. It's a much-improved interface developed around the needs of flash memory rather than spinning disks. What's NVMe performance like in the real world?

Insane speeds up to 7,300 MB/s 1 deliver top-tier performance with ridiculously short load times for the elite gaming experience you’ve been waiting for. The point is, there's not much this Lexar drive can't do, and for a good price. If you have a spare Gen4 slot in your machine, and you are desperate for more game storage space, I highly recommend you look to the Lexar NM790 to fill that slot. SK hynix’s Gold P31 is great if you’re looking to increase your laptop storage, not only to gain capacity but to gain battery life, too. While some drives may perform well against the Gold P31 in benchmarking, the SK hynix is much more power-efficient, which will lead to longer off-the-charger sessions. Laptop users who prioritize battery life should definitely put the new SK hynix Gold P31 at the top of their drive list. Additionally, the Gold P31's very strong write performance and ultra-high efficiency make it a well-rounded choice for many desktop users as well.has become a more attractive capacity point for SSDs as time has gone on. While there are now many options available, most come with compromises of one sort or another. You may have to settle for QLC, a weaker controller, no DRAM, unreliable hardware, etc. This is not always a big deal, especially if the drive is intended to be a secondary gaming drive. In the PlayStation 5, however, extra cooling is beneficial, so it’s convenient to have a heatsink option available. At the same time, laptops favor bare drives and especially single-sided drives, the latter of which have been very rare with TLC until recently. The XS70 is priced well for a high-performance 2TB SSD, but there's fierce competition from other third-party SSD makers in this price range.The Silicon Power XS70 2TB SSD is a 2280 (80mm length) M.2 PCIe NVMe drive. It combines Micron 176-Layer TLC NAND with a Phison PS5018-E18 controller and 2GB of DDR4 RAM. That combination is common to many of the best SSDs, including the highly regarded Seagate FireCuda 530 and Kingston KC3000. Many of the first PCIe 5.0 SSDs come with active cooling solutions, meaning they have a fan attached to the heatsink. In contrast, the T700 has a stylish passive heatsink that does an admirable job of assuring top-notch performance. Crucial also offers the drive without a heatsink, thus allowing you to use either your own third-party cooler or the in-built motherboard M.2 heatsinks that are becoming increasingly popular.

One last caveat to drop in before we get to our product recommendations surrounds Intel's SSD line. Intel for a while sold a family of M.2-based storage products under the brand name Optane, in two very distinct types of drive. Intel's"Optane SSDs"were SSDs like any other, bootable drives that can serve as a stand-alone boot drive or as secondary storage. They were discontinued for consumers in 2021, but you may still see them around. (Intel sold its SSD business at the end of 2021 to SK Hynix, which spun it off into a new subsidiary, Solidigm.) Internal drive tests currently utilize Windows 11, 64-bit running on an MSI MEG X570/AMD Ryzen 3700X combo with four 16GB Kingston 2666MHz DDR4 modules, a Zotac (Nvidia) GT 710 1GB PCIe x2 graphics card, and an Asmedia ASM3242 USB 3.2×2 card. Copy tests utilize an ImDisk RAM disk employing 58GB of the 64GB total memory. If you're copying a game from one drive to another or validating game files in Steam, faster NVMe drives make a difference. They can also shave off a second or two when it comes time to load a game level, but the more significant difference is against hard drives, where even a slower SATA SSD is much faster. Go beyond a certain point, and all SSDs start to feel similar.Rather more specific to this WD drive is the latest 2.0 version of the company's Game Mode drive management software. WD claims it improves game loading times courtesy of a so-called "read look-ahead" algorithm, which predictively caches game data. It now runs automatically, detecting when games are loaded. How much that kind of feature actually makes a difference in the real world is notoriously difficult to pin down. But it's unlikely to be revolutionary. It's also pretty speedy in random workloads, which will make for a snappier system. It comes in at 75MB/s read and 291MB/s, which is in the mix with some of the faster Gen4 and first-wave Gen5 drives we've tested. Smaller-capacity 32GB and 64GB M.2 SSDs are also available for use in embedded applications or for SSD caching, but these are of marginal interest to upgraders or PC builders. Pricing on these drives ranges anywhere from 10 to 75 cents per gigabyte, and the biggest factor affecting price is the bus type of the drive. Today’s A-list titles can take up 200GB 2 or more of storage. A range of capacities from 1TB to 4TB 2 means you get to keep more games at the ready and get into the action fast.