With the PC establishment seemingly sewn up, Samsung has increasingly targeted customers who buy drives one at a time rather than in lots of a thousand. The size of this market is growing as SSDs become more affordable for upgraders and system builders. Right now, the sweet spot is around $200, where there are numerous drives in the 240-256GB range. One of those options is Samsung's next-generation 840 Series SSD.
While the name suggests this drive is a successor to the 830 Series, the new model isn't quite a direct heir. Yes, the controller has been updated and the NAND is built using a smaller fabrication process. However, Samsung has traded the 830 Series' MLC flash for TLC chips that squeeze an extra bit into each cell. This NAND costs less per gigabyte, which is probably why the 840 Series 250GB rings in at just $180 right now. The implications of that extra bit go beyond pricing, affecting not only the drive's performance, but also its longevity. Let's take a closer look.
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