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The market has settled on 22mm wide as the standard for desktop and laptop implementations; the aftermarket drives available and the accessible slots we've seen have all been that width. The most common lengths we've seen are 80mm ("Type-2280") and 60mm ("Type-2260"). The lengthier the drive, the more NAND chips you can tend to stuff on it (plus, M.2 drives can be single- or double-sided), though know that length isn't an absolute measure of capacity. 42mm, 60mm, and 80mm M.2 SSDs 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. Slightly less edifying are the P41's operating temps. At a 71°C peak, it's a little toastier than we'd ideally like. Not that we saw any signs of any thermal throttling. But temps that high is a teensy bit of a long-term reliability concern.
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. 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. We put every SSD we get in the PC Gamer labs through their paces in various benchmarks made up of a mix of synthetic tests and real-world applications. To ascertain a drives sequential throughput, we use ATTO SSD Benchmark for compressible data (a best-case scenario) and AS SSD for incompressible data (more realistic). We also test random throughput with AS SSD and a combination of CrystalDiskMark 7.0 and Anvil Pro.Armed with the latest Phison controller and high-performance NAND flash memory, a drive like the Silicon Power XS70 is a fearsomely fast drive for Sony's PlayStation 5.
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. Definition and conditions of TBW (Terabytes Written) are based on JEDEC standard; JESD219A Solid-State Drive (SSD) Endurance Workloads, July 2012, and defined for the service life. 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. 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. 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.Even in mSATA's heyday, though, a replacement was in the works. During development, it was known as NGFF, for "Next-Generation Form Factor." As it took shape, though, it took on its current, final name: M.2. The drives would be smaller, potentially more capacious, and, most important, not necessarily reliant on SATA. Experience superior performance and reliability that you can only get from the world's number one brand for flash memory since 2003. All firmware and components, including Samsung's world-renowned DRAM and NAND, are produced in-house, allowing end-to-end integration for quality you can trust. Know which bus you're on. In a laptop-upgrade scenario, you're almost certainly swapping out one M.2 drive for another, with the intent of gaining capacity. Make sure you know the specifications of the drive coming out of your system—and whether it's reliant on the SATA or PCI Express bus—so you can install the same, presumably roomier kind going in.
Average Power Consumption (system level) *Average: 6.2 W *Maximum: 8.9 W (Burst mode) * Actual power consumption may vary depending on system hardware & configuration 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. South Korean memory-chip maker SK Hynix is a relative newcomer to the consumer solid-state drive market, but you would never know that based on its first offerings. The SK Hynix Platinum P41, a PCI Express 4.0 NVMe M.2 SSD, is its best yet. It dominated our PCMark 10 and 3DMark Storage benchmark testing, setting several new records in the process. The P41 supports 256-bit AES hardware-based encryption. SK Hynix provides a clone utility tool, the SK Hynix System Migration Utility, for its SSDs, in addition to Easy Drive Manager software, which lets you see detailed information on drive health, run diagnostics, and erase the drive. And the P41 can be had for a very reasonable price in its 1TB and 2TB capacities. Who It's ForWelcome 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. Silicon Power is a brand that probably doesn’t get much attention compared to the likes of Samsung or WD, but when you look at its XS70 NVMe SSD with its high-end specifications, it's clear that the brand name isn't everything. Armed with the latest Phison controller and high-performance NAND flash memory, a drive like the Silicon Power XS70 should have no problem competing with thebest SSD on the market. 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. EXCERIA PLUS G3 SSD / EXCERIA with Heatsink SSD: Sequential speeds are measured with CrystalDiskMark 8.0.4 x64, Q=32, T=1.
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? 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. At the core, an SSD is just a thin circuit board studded with flash-memory and controller chips. Why not design around that? Thus the M.2 form factor was born. But we're getting ahead of ourselves. EXCERIA PLUS G2 SSD / EXCERIA PLUS SSD / EXCERIA SSD: 4KiB random performance is measured with CrystalDiskMark 6.0.2 x64, Q=32,T=8. 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.All of this leaves the minor matter of how this drive actually performs. When it comes to peak sequential throughput, the Platinum P41 is basically as fast as anything else out there, bar a few rounding errors. OK, the Samsung 990 Pro is a bit faster at 7,462MB/s for reads to the P41's 7,375MB/s. But, honestly, it's inconsequential. The same goes for writes, where almost all the top drives will do just under 6.9GB/s.
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