Why is RAM Disk so much faster than an SSD drive?
closed as not a real question by Shane Madden, Chris S♦, John Gardeniers, ewwhite, Iain May 9 '11 at 7:54
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It has to do with a number of factors. Bandwidth to memory vs SSD, also write latency speeds, DRAM is constantly refreshed and thus has a latency measured in nanoseconds, whereas Flash requires a high voltage to write into the gate along with a few other details, often SSD latency is measured in microseconds.