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Here on March 31, 2015, Samsung revealed the SSD 850 EVO in two new form factors: M.2 and mSATA. So much for the "ordinary" 2.5-inch drives. The drives came with a class-leading five-year warranty as well. The 2.5-inch version of the Samsung SSD 850 EVO also made use of a new controller dubbed MGX (at least in its 120GB, 250GB, and 500GB models the 1TB version of the drive used Samsung's existing MEX controller). Together, the benefits of this new technology are easy to sum up: more speed and more life, at a lower cost. This change might seem counterintuitive, and a move backward, but this actually increases endurance and performance. This allows Samsung to compress more NAND in a smaller space, which in turn reduces manufacturing costs and makes possible higher capacities in smaller form factors.ĭoing so also allows Samsung to increase the size of the fabrication node instead of shrinking it, so it's gone from a 19nm process on the SSD 840 EVO to a 40mm process in the SSD 850 EVO. (Samsung's competitors, notably Toshiba and Intel/Micron, are coming to market with similar 3D technologies, too, mind you.) In the simplest terms, this means the NAND chips mustn't necessarily be laid side-by-side or end-to-end like the center strip of paint on a road, but rather, at the manufacturing level, can be layered on top of each other. It was an all-new drive that used first-to-market 3D NAND that first appeared in the company's flagship consumer-grade SSD, the SSD 850 Pro. To follow up its success with the SSD 840 EVO, though, Samsung released the SSD 850 EVO, putting it out first in the traditional 2.5-inch form factor. Now, the SSD 840 EVO did hit a slight roadblock in longer-term use, which we'll get to in a moment. Samsung even threw in a secret sauce named RAPID mode, which allowed the SSD to cache files on system memory, enabling its SSDs to show theoretical performance well beyond what's possible on a traditional SATA 6Gbps SSD.
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The drives offered blistering performance, outstanding reliability, and a top-notch software package, which made them well-rounded and tough to beat in the marketplace. These SSDs took the market by storm, catapulting to the top of our (and many others') benchmark charts and establishing the SSD 840 EVO as one of the most popular all-around consumer SSDs ever conceived. To say these SSDs were popular would be like saying Gangnam Style has a few views on YouTube. The model preceding this family was the SSD 840 EVO, which was part of the Samsung SSD 840 family of SSDs. Since 1982, PCMag has tested and rated thousands of products to help you make better buying decisions. ( See how we test everything we review (Opens in a new window).)
So there does appear to be some evidence of it.Īlthough today's review is about the all-new M.2 version of the Samsung SSD 850 EVO ($119.99 for 250GB), let's rewind a bit and look at the context of this SSD. Though that sounds like marketing bluster, Samsung actually backs it up with class-leading performance across its SSD lineup. This puts Samsung in a rare and enviable position, and one that it says allows it to fine-tune the performance of its SSDs in a way that other companies simply can't match. This is a position that no other company enjoys-not even Intel, which is able to produce its own flash memory (known in SSD lingo as "NAND flash"), and its own circuit boards and firmware, but uses third-party controllers. Because of its size and capabilities, the company can manufacture every single critical component inside its M.2 SSDs, including the flash memory, the controller chip, and the firmware. Samsung is the 800-pound gorilla of the solid-state drive (SSD) world.
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