We mentioned NVMe above. NVMe is another technical hurdle to consider, because systems and motherboards need board-level support for these drives to be bootable. All late-model motherboards now support NVMe M.2 drives, but older boards are not guaranteed to support booting from an NVMe-based drive. Outside of new motherboards, these high-bandwidth, NVMe-capable slots are also found in some recent laptops. Also note that in some cases, a laptop may support a PCI Express NVMe drive, but it may be soldered to the motherboard and thus not upgradable. So, if you're thinking of upgrading a recent laptop or convertible, be sure to consult your manual very closely before buying one of these drives. It improves game loading times courtesy of a so-called "read look-ahead" algorithm, which predictively caches game data.

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 its exceptional 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 It's in the real-world tests where the SN770 really struts its stuff. You'd be hard-pushed to tell the difference between this drive and much faster offerings in most day-to-day operations. Given this is the cheaper drive right now, that counts for a lot. The SN850 is the better drive if you need better performance, but you will pay considerably more. It's worth noting that this drive can get hot when pushed, just like the SN850. It hit 76°C after a long day of testing, but without direct cooling on it, not even a heatsink. It should be fine in most systems, especially if your motherboard does come with some cooling solution.

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. Welcome to the cutting edge! You're shopping for a kind of drive that many folks don't even realize exists. As a result, you need to pay attention to several factors that may not be documented very well while you shop. Let's recap.

Definition of capacity: KIOXIA defines a megabyte (MB) as 1,000,000 bytes, a gigabyte (GB) as 1,000,000,000 bytes and a terabyte (TB) as 1,000,000,000,000 bytes. A computer operating system, however, reports storage capacity using powers of 2 for the definition of 1GB = 2

Right now, PCIe 4.0 is the go-to PCIe generation. That's because it offers a high speed at a reasonable cost. The newest SSDs on the market offer PCIe 5.0 capability, which doubles the theoretical bandwidth an SSD can run at. However, these are few and far between and awfully expensive. Also the first drives of any PCIe generation tend to end up much slower than what that generation is truly capable of. As for the actual flash memory used, it's SK Hynix's latest and very greatest 176-layer 3D TLC NAND. It's about as advanced as TLC memory currently gets, and SK Hynix claims a 40% performance boost over its old 128-layer chips. The net result is sequential read and write specs for this 2TB model of 7,000MB/s and 6,500MB/s respectively.

These values are the best values obtained in a specific test environment at KIOXIA Corporation and KIOXIA Corporation warrant neither read nor write speeds in individual devices. Read and write speed may vary depending on a device used and file size read or written.Now, to reiterate an important point: A drive may come in the M.2 form factor, but that says nothing about the bus that it makes use of. Determining that is just as important as making sure it fits. KIOXIA Corporation defines “RoHS Compatible” products as products that either ( i ) contain no more than a maximum concentration value of 0.1% by weight in Homogeneous Materials for lead, mercury, hexavalent chromium, polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs), bis(2-ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), benzyl butyl phthalate (BBP) and diisobutyl phthalate (DIBP) and of 0.01% by weight in Homogeneous Materials for cadmium; or ( ii ) fall within any of the application exemptions set forth in the Annex to the RoHS Directive(*). This does not mean that Kioxia Corporation products labeled “RoHS COMPATIBLE” are entirely free of substances controlled by the RoHS Directive and does not constitute a warranty or guarantee that such products will comply with the specific laws and/or regulations adopted in any particular jurisdiction. The Samsung SSD 990 Pro, the company's flagship PCI Express 4.0 NVMe internal solid-state drive, has a hard act to follow in the Editors' Choice-winning SSD 980 Pro, but for the most part it makes a great product even better. This power-efficient drive gets high marks for raw speed, everyday application performance, a strong software suite, and hardware-based encryption. The heatsink-equipped version of this drive performed slightly better than the non-heatsink version (which we tested using our testbed's motherboard's heatsink) in most of our benchmarks. It doesn't quite merit the 980 Pro's Editors' Choice award, because other recent internal SSDs have outpaced it in our gaming benchmarks, but its overall capability makes this Samsung a versatile drive well-suited for creative tasks. Who It's For Nowadays, though, many lean, premium laptops can make use of PCI Express-bus M.2 SSDs. (Just about all new desktop motherboards with M.2 slots also support PCI Express M.2 SSDs, too.) With these, you may see a substantive increase in performance in benchmark testing, but in most real-world usage, they'll just feel like a fast, premium SATA SSD. EXCERIA PLUS G2 SSD / EXCERIA PLUS SSD / EXCERIA SSD: 4KiB random performance is measured with CrystalDiskMark 6.0.2 x64, Q=32,T=8.