| http://www.w3.org/ns/prov#value | - per Second)Samsung 830 SSD | Read 520MB/s (IOPS 80k) Write 400MB/s (IOPS 36k)Samsung 840 SSD | Read 540MB/s (IOPS 96k) Write 250MB/s (IOPS 62k)Samsung 840 PRO SSD | Read 540 MB/s (IOPS 100k) Write 520MB/s (IOPS 90k)As you can see the 840 has a much slower write speed; this is due to it using TLC NAND. The write speeds for the standard 840 is still adequate so is a great choice versus the cheaper 8
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