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Samsung SSD 850 EVO (4TB)

A ubiquitous sequence in a universe of commerce: You can tell how successful a certain product is by a array of opposite ways we can buy it.

For example, when we demeanour during a automobile maker’s lineup, we can mostly tell that indication sells a many by a one charity in a many colors. Solid-state drives (SSDs) and cars might not be 100 percent comparable, nonetheless it certain seems like it, during slightest when it comes to Samsung’s world-beating, princely SSD 850 EVO line.

Samsung SSD 850 EVO (4TB) (Box)

When this SSD family initial arrived in Dec of 2014, it was an present success, both commercially and critically. To this day, roughly dual years later, it’s still one of a many endorsed SSDs around (even by us), due to a singular mix of high performance, high endurance, and low price.

It’s clearly been a rarely successful SSD array for Samsung, given not usually was it updated post-launch to a whopping 2TB capacity, nonetheless a association has updated it in 2016 a second time, rolling out an implausible $1,599-MSRP 4-terabyte (4TB) model. That’s a highest-capacity Serial ATA SSD on a market, and a SSD 850 EVO as a whole has turn a many enduring, capacity-tweaked line of them all.

The pierce to 4TB came about given of memory-technology advancements on Samsung’s finish that have emerged between a time a expostulate was initial expelled and now. Back in a early days of 2014, a SSD 850 EVO was combined regulating Samsung’s second era of 3D TLC V-NAND, that had 32 layers. (See a SSD-lingo authority for an explainer of NAND forms and many more.)

Specs Core Tech: The Basics

If you’re usually throwing adult with that stuff, before to a SSD 850 EVO series, SSDs used NAND peep that was laid down in a singular prosaic plane. That was all glorious and excellent for a few years, nonetheless as a memory cells were ceaselessly reduced in distance to boost ability (packing in more using increasingly modernized production processes), opening became an issue, as did endurance. After all, we can make areas that reason data only so little before we start to run into limitations. So Samsung, followed after by other flash-memory manufacturers, combined a NAND die with mixed straight layers, built one atop another. This authorised Samsung to make a peep chips physically incomparable on SSD circuit play and usually raise adult a NANDs instead.

When a SSD 850 EVO launched behind in 2014, Samsung was regulating a second era of 3D V-NAND, that had 32 layers. It used this record for all of a strange capacities of a SSD 850 EVO (120GB, 250GB, 500GB, and 1TB), as good as a 2TB chronicle that came later. However, Samsung is now producing third-generation, higher-capacity 48-layer NAND, and so a 4TB SSD 850 EVO was born.

Samsung SSD 850 EVO (4TB) (Angle View)

This new indication recycles a lot of a tools from a 2TB model, including a MHX controller and PCB. (The 1TB and smaller drives used a opposite controller.) But it now has a towering 4GB of DRAM cache, and new firmware. (The 2TB expostulate had 2GB of DRAM cache.) Despite a brazen boost in capacity, a rated opening specs for this expostulate sojourn unvaried from a prior capacities. This performance-claim flatline is a teeny bit surprising, given that SSDs in a given family typically perform improved as a ability increases, all else being equal. (More chunks of memory concede for increasing parallelism.) But in a box of a Samsung SSD 850 EVO, it seems like it was already as quick as a SATA interface formerly allowed.

What this means: Currently, all of a Samsung SSD 850 EVO drives have a same specs in terms of consecutive reads and writes, 540MB per second and 520MB per second, respectively. Some of a other specs (such as pointless examination and write speeds) change according to capacity, nonetheless not by much.

Surprisingly, one selection that a 4TB expostulate shares with a 2TB indication is write-endurance. At both capacities, a drives are rated to be means to write adult to 300TB of data. That is 4 times what a 120GB and 250GB drives are able of, and double what a 500GB and 1TB drives offer. It’s a decent step adult from a lower-capacity drives, nonetheless it is startling that we didn’t see an boost in continuation when doubling a ability from 2TB to 4TB. For what it’s worth, 300TB is some-more than a customary finish user, underneath standard workloads, will ever write to a expostulate in a lifetime, so it’s not a vital concern. It’s usually peculiar that a rating didn’t change, given a fact that a expostulate has twice as many NAND flash. That’s a common sequence of things as we go adult an SSD maker’s stack.

The 4TB SSD 850 EVO still includes a five-year warranty, like a other capacities, that is a longest of a class, as many “value” drives include only three years of coverage. It also includes Samsung’s glorious Magician software, that we’ve lonesome many times previously. (Hit a couple for a examination of a 500GB SSD 850 EVO, and some-more fact on Magician.)

The thing is, this is a sole 4TB Serial ATA SSD on a market, so a Samsung SSD 850 EVO doesn’t have any like-capacity competition. And given Samsung has tagged it with a whopping $1,599 list cost (with a expostulate indeed offered for $1,400 to $1,500 during this essay from several e-tailers), it exists in some severely rarified air, for sure. It also levies a cost-per-gigabyte reward over a 2TB SSD 850 EVO, that was offered in a low $600’s during this writing.

One engaging “bonus” to note is that, during press time, Samsung was charity a giveaway download of a diversion Watch Dogs 2 with a squeeze of any subordinate Samsung SSD (or monitor), and that includes a 4TB version. That’s good if you’re an zealous PC gamer, nonetheless given a cost of this SSD, it’s expected proceed some-more of an inducement with lower-capacity SSDs. 


If you’re new to a universe of SSDs, a few things are value observant when it comes to performance.

For starters: If you’re upgrading from a customary spinning tough drive, any difficult SSD will be a outrageous improvement, speeding adult foot times and creation programs launch faster. Most of today’s high-end 2.5-inch SSDs make use of a specific interface, SATA 3.0 (also called “6Gbps SATA”), to grasp limit speed contra older, nonetheless still common, SATA 2 ports, that tip out during 300MB per second. We exam all a SSDs on a SATA 3.0-equipped test-bed PC to uncover their full opening abilities. To get a many speed probable from difficult drives, you’ll need a complement with SATA 3.0 capability, as well.

If your complement is formed on an Intel chipset after than those ancillary 2nd-Generation “Sandy Bridge” processors (or one of a newer AMD chipsets), your laptop or desktop substantially has this interface. Be certain before buying, though. If your complement is creaky and doesn’t have SATA 3.0 support, there’s little indicate in profitable a reward for a expostulate with a limit probable performance. SATA 3.0-capable drives will work usually glorious with previous-generation SATA ports, and there’s meagre reason to compensate additional for expostulate speed that your complement can’t take advantage of. Any simple stream SSD will work usually as well, in that SATA 3.0-less scenario. That said, we don’t have a lot of alternatives if we wish or need 4TB in one SATA drive, so this indicate is partially indecisive in this SSD’s case.

PCMark 7 (Secondary Storage Test)

The Secondary Storage Test is a subtest of Futuremark’s incomparable PCMark 7 benchmarking suite. It employs a opposite proceed to expostulate contrast than pristine speed tests like AS-SSD, that we’ll get to next. PCMark 7 runs a array of scripted tasks customary of bland PC operation and hoop accesses. It measures app launches, video-conversion tasks, picture import, and more. The outcome is a exclusive numeric score; a aloft a number, a better.

This measure is useful in gauging ubiquitous opening contra other drives. Note that, like with a 10GB File Copy Test, we secure-erase all SSDs before using PCMark 7’s Secondary Storage Test.

Samsung SSD 850 EVO (4TB) (PCMark 7)

In a initial contest, a SSD 850 EVO 4TB surfaced all prior SATA drives on a leaderboard, creation it a fastest 2.5-inch SATA SSD we’ve seen so distant by a amiable margin. This isn’t a outrageous surprise, as SSD opening typically beam with capacity. What is startling is that a 4TB expostulate even kick a 1TB chronicle of a Samsung SSD 850 Pro, that uses MLC NAND and is generally deliberate a fastest SATA expostulate income can buy. It’s also critical that Samsung drives occupy 4 of a 5 top spots in this rival set.

AS-SSD (Sequential Read Write Speeds)

The benchmark application AS-SSD was designed privately to exam SSDs (as against to normal tough drives). This environment within AS-SSD measures a drive’s ability to examination and write vast files. Drive makers mostly quote these speeds, as a fanciful maximum, on a wrapping or in advertising.

Sequential speeds are critical if you’re operative with really vast files for picture or video editing, or we play lots of games with vast levels that take a prolonged time to bucket with normal tough drives. We secure-erase all SSDs before using this test.

Samsung SSD 850 EVO (4TB) (AS-SSD Seq Read)

Most of a SATA drives are in a same ballpark when it comes to sequential-read speeds, with a few critical exceptions. The SSD 850 EVO wasn’t utterly as quick as a foe in this test, however, finishing mid-pack alongside a smaller-capacity sibling. It’s a bit startling to see a 4TB and 500GB drives measure accurately a same, however, as 4TB is such a vast ability boost that we suspicion it would interpret to during slightest a little uptick in opening on this test.

Samsung SSD 850 EVO (4TB) (AS-SSD Seq Write)

TLC-based drives such as a Samsung SSD 850 EVO are famous to have some issues with write operations, nonetheless Samsung utilizes a workaround in a form of a “pseudo SLC” cache. In this design, some dull cells are treated like SLC NAND for a purpose of caching writes some-more quickly, thereby improving performance. When a expostulate is idle, a cache is burning to a TLC NAND, so it’s pure to a user.

As we can see from this chart, this proceed is utterly effective, and nonetheless a 4TB SSD 850 EVO didn’t take a tip spot, it’s right subsequent to a SSD 850 Pro, that doesn’t have any special write-speed record other than good, out-of-date MLC NAND. And that’s a indicate of a pseudo-cache: to make a TLC expostulate perform some-more like an MLC drive, and it works. That said, a 4TB expostulate achieved superbly notwithstanding not alighting on a tip stage of a chart. The differences among a top-third drives here are medium during best.

AS-SSD (4K Read Write Speeds)

This test, also a partial of a SSD-centric AS-SSD benchmark, measures a drive’s ability to trade little files. Often overlooked, 4K performance, utterly 4K write performance, is critical when you’re articulate about foot speed and module launch times.

When booting adult your complement or rising programs, many little files get accessed and edited frequently. The faster your expostulate can write and examination these kinds of files (especially energetic couple library, or DLL, files in Windows), a faster your OS will “feel.” Since these little files are accessed many some-more mostly than vast media or game-level files, an SSD’s display on this exam will have a incomparable impact on how quick it feels in standard use.

Samsung SSD 850 EVO (4TB) (AS-SSD 4K Read)

Once again, a 4TB chronicle of a SSD 850 EVO scored roughly accurately a same as a initial chronicle we reviewed, that has nonetheless a tiny 500GB capacity. (Seems old-fashioned now, eh?) Its measure was adequate to acquire it a decent fourth place in this rival set, creation it one of a faster drives we’ve tested during both little and vast capacities. That’s utterly an feat for a smaller SSD 850 EVO drive, if a glorious nonetheless not overwhelming display for a incomparable one. 

Samsung SSD 850 EVO (4TB) (AS-SSD 4K Write)

In this test, a 4TB expostulate warranted a eminence of being a fastest expostulate in a vast and flourishing SSD 850 EVO family, that is utterly an achievement. It was usually 15MB per second slower than a fastest drive, commanding out during 110MB per second overall. This places it into a tip row of SATA drives we’ve tested, however, definition it has some-more going for it than ability alone.

Anvil’s Storage Utilities

Anvil’s Storage Utilities is, like AS-SSD, an SSD-specific set of expostulate benchmarking tests. We’ll news here a Overall Score, that is subsequent from a test’s Read and Write scores with a application run during default settings.

Samsung SSD 850 EVO (4TB) (Anvil)

The 4TB SSD 850 EVO landed in a runner-up mark in this test, delivering an considerable 5,072 score. That’s usually a gnat’s eyelash divided from a tip spot, once again creation a 4TB expostulate a fastest of a SSD 850 EVO family in this test. It even kick a 1TB SSD 850 Pro by a smidge, that is like a souped-up Honda Civic violence a batch Acura during a dragstrip. There’s not many else to say, other than that a 4TB expostulate is clearly fast.

Crystal DiskMark (QD32 Testing)

Crystal DiskMark uses incompressible information for testing, that stresses many difficult SSDs utterly a bit given they rest on information application to grasp their limit turn of performance. This sold exam is designed to replicate a duties of an SSD located inside a Web server, asked to perform a smattering of little reads. While it’s reading these files, a reserve of 32 glorious requests is lined up. That’s customary of a high-volume Web server, that has to perform requests drifting in all during a same time from several clients.

Samsung SSD 850 EVO (4TB) (Crystal DM 4K Read QD32)

The 4TB Samsung SSD 850 EVO showed some of a “value” roots in this test, as it wasn’t utterly adult to a severe final of being strike with this consistent reserve of examination requests. The expostulate finished in a reduce half of this benchmark set. That’s not astonishing for a budget-oriented drive, nonetheless surprisingly a 500GB chronicle of a expostulate achieved improved this time around. This exam also clearly highlights a disproportion between a EVO and Pro models of a 850.

Samsung SSD 850 EVO (4TB) (Crystal DM 4K Write QD32)

The 4TB chronicle of a EVO finished nearby a same mark in a write tests that it did in a examination exam this time around, about a center of a rankings. This isn’t startling for a midrange SSD, nonetheless a 500GB chronicle once again finished good aloft in a rankings. We could not pinpoint accurately why there’s a inequality here, nonetheless it was transparent on both tests, and we accurate it on dual opposite test-bed systems we attempted for a existence check.


There’s a reason because Samsung keeps churning out new versions of this drive: It’s a really plain height that offers all people need in an SSD, namely speed and continuation during an affordable cost per gigabyte. It’s not a difficult equation, nonetheless given all a variables surrounding SSD technology, it’s a tough reduction to get usually right. But Samsung has proven it can do it, time and time again.

Samsung SSD 850 EVO (4TB) (Low Angle View)

Despite a newer and faster SSD 960 EVO and SSD 960 Pro drives recently arriving, they expected won’t disintegrate a SSD 850 EVO from a popular-choice pedestal any time soon, given a SSD 960 models are M.2 PCI Express drives, that many people can’t make use of given their desktop or laptop motherboards don’t support them. Therefore, it’s expected that a SSD 850 EVO will continue to be a best-seller for many years to come as we start as a class to quit away—slowly—from a aging SATA interface.

As distant as a 4TB chronicle of a SSD 850 EVO goes, though, it’s unsurprisingly identical to a prior versions of a drive, in that it’s one of a fastest SATA drives accessible while charity a glorious module package, strong endurance, and not-outlandish pricing given a capacity. You positively compensate a reward when compared to selling 4 apart 1TB SSD 850 EVO drives, that would run we about $1,200. But a multi-SSD array is a whole opposite animal, applicable usually on a desktop PC, and requiring we to disaster with a RAID array or residence 4 drives as dissimilar drives. If we wish to ascent a laptop, we have usually one shot and one bay.

Overall, a 4TB SSD 850 EVO is positively lustworthy, and if we can means and implement it, we won’t be disappointed. We’re self-denial an Editors’ Choice endowment on this 4TB version, though, given during a cost it is a specialty object and utterly expensive; we’d have favourite to see a “volume discount” on gigabytes here, not a reward taxation for a mega-capacity. We doubt many people will indeed need an SSD this ample and buffed-up, nonetheless for those that do, it’s both a usually and a best diversion in town.


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