"Let the good times roll" must exist what Samsung'southward SSD division is thinking right about now. After delivering what is yet the world'southward fastest SATA SSD last summertime, Samsung tempted value-oriented enthusiasts in December with its '5-NAND'-based 850 Evo serial. Like the 2022's 840 Evo, the 850 Evo was equipped with TLC NAND, admitting with the twist of beingness 3D TLC NAND -- known as 5-NAND in Samsung's solutions.

Whereas NAND is usually built horizontally (apartment), this limits density. V-NAND builds upwards making it horizontal and vertical, hence 3D, assuasive Samsung to stack layer upon layer of transistors (cells) to greatly ameliorate density. Additionally, while other manufactures are pushing 20nm NAND or smaller, Samsung is able to become abroad with the 40nm process.

On top of improving density, endurance and performance, this new design also helps to reduce production costs. Having already proven this with the 850 Pro and at present 850 Evo series, Samsung has continued to push its Five-NAND applied science into more SSDs.

Earlier this twelvemonth we saw the arrival of the T1 portable USB 3.0 SSD which was based on the 850 Evo'southward technology and today we accept 2 similarly 'new' drives.

Like the T1, these are new 850 Evo products that focus on different form factors. Whereas the original 850 Evo series used the SATA 6Gb/s interface, these latest versions brand employ of the more compact mSATA and higher bandwidth M.ii interfaces.

Known simply as the Samsung 'SSD 850 Evo mSATA' and 'SSD 850 Evo 1000.two' these latest SSDs are designed for customer PCs. The mSATA version will no doubt entreatment to mobile and compact PC users, while the One thousand.ii version will be more sought afterward by power users.

Samsung SSD 850 Evo mSATA

Rather than talk near the SSD 850 Evo features all over over again, we volition stick to features of the mSATA version. For starters, the mSATA drives will be bachelor in 120GB, 250GB, 500GB and 1TB models, the largest of which uses the Samsung MEX controller and 1GB of LPDDR2 DRAM cache memory.

Meanwhile, the smaller 120GB/250GB and 500GB models use the Samsung MGX Controller and all take a 512MB LPDDR3 DRAM cache. All models take been given a maximum sequential read throughput of 540MB/due south with a write speed of 520MB/s using the TurboWrite feature.

Beingness an mSATA drive, information technology measures just 29.8 x 50.8mm and is just 3.85mm thick. Moreover, the drive is not encased in annihilation, information technology is simply a small PCB with the mSATA pin connector. This coupled with the tiny dimensions mean that fifty-fifty the heaviest version (1TB) weighs but 8.5 grams.

The 850 Evo mSATA series is backed by a five-year warranty, though there is little gamble information technology will dice from existence overworked in that fourth dimension as the 120/250GB models permit for 40GB of data to be written per day and the 500GB/1TB models double that figure. That means the 120/250GB models are good for a total of 75TB of writes and 150TB for the 500GB/1TB models.

To put that into perspective I have been running a Samsung SSD 840 Pro drive in my principal system for two and a half years at present and have only written 27TB worth of data. On my current trajectory, my SSD volition write around 54TB of information over v years, which is still well below the 75TB quoted for the smaller models.

Samsung SSD 850 Evo Thou.ii

When the Haswell microarchitecture landed in June 2022 we were less excited about Intel's latest processors and much more interested in the new M.2 interface, formerly known as the Next Generation Form Cistron (NGFF). At the time, mainstream SSDs were limited to the SATA 6Gb/s interface and although some used PCIe adapter cards, they were expensive and far less practical.

The way forward was clearly SATA Express and its small-scale form factor alternative M.2 which provides support for PCI Express 3.0 and Series ATA 6Gb/s. Although nosotros just looked at the mSATA version of the SSD 850 Evo, the M.2 class factor really replaces mSATA.

Whereas mSATA uses the PCI Express Mini Card physical layout, 1000.ii is a more flexible physical specification that allows for different module widths and lengths. More importantly, K.2 provides considerably more bandwidth (at least 2GB/s) which is over triple that of the SATA iii.0 motorcoach.

However, just considering in that location is 2GB/s worth of bachelor bandwidth doesn't automatically make Chiliad.2 SSDs faster than SATA SSDs. Some M.2 SSDs are still jump by the constraints of the SATA iii.0 interface while others are designed to utilize PCIe x2 and PCIe x4 bandwidth.

Unfortunately, the 850 Evo Yard.2 is still a SATA 6Gb/s SSD which limits it to a theoretical peak bandwidth of merely 600MB/s.

There are few true PCIe G.2 SSDs bachelor today. A popular example is the Samsung XP941, which is a PCIe Gen2 4-lane 1000.ii SSD boasting a sequential read speed of upwards to 1170MB/due south and a write speed of 950MB/s.

The 850 Evo Grand.two series comes with a more modest throughput of 540MB/s read and 500MB/s write (notation that the write speed is 20MB/southward slower than the mSATA models).

Although the 850 Evo M.two serial uses the G.2 class cistron, that doesn't narrow down the dimensions or connectors like it does with mSATA. The M.two form cistron features 3 different connectors or 'keys' which specify the maximum number of PCIe lanes the drive can apply.

The keys are known equally the "B key", "M key" and "B & M key". The "B key" is express to two PCIe lanes while the "M key" tin apply four PCIe lanes. Oddly, most drives limited to PCIe x2 are keyed for B and M assuasive them to work with both sockets, leaving just the PCIe x4 drives using the "M fundamental".

If that weren't confusing plenty, not all Yard.2 drives are the aforementioned length or width and some motherboards are less flexible than others. The Yard.2 standard allows module widths of 12, sixteen, 22 and 30mm, and lengths of 16, 26, 30, 38, 42, 60, eighty and 110mm.

Currently, M.two drives intended for use in PCs are 22mm wide, simply they come in a variety of lengths.

To make it easier to determine a drive'southward dimensions, both the width and superlative are expressed in a single number that combines the 2 dimensions. For example, the 850 Evo M.ii series is 22mm broad and 80mm long so they are listed every bit existence a 2280 (22mm x 80mm).

Despite allowing for drives longer than 110mm, Samsung has limited its M.ii range to a maximum capacity of 500GB, so at that place'southward no 1TB model.