Samsung 840 Pro 256GB SSD

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Synthetic Performance

We start off with synthetic results from the popular HD Tune and CrystalDiskMark utilities. They don't tell the whole story of course, but it's a quick and dirty way of gauging relative performance between drives, and of course, it's easily reproducible by our readers at home.

The 840 Pro dominated the field in HD Tune's transfer rate benchmark, eclipsing the Hyper X 3K 240GB's read speed by a hair, and beating all comers in write speed by a substantial margin. Access times were also well ahead of the others. Its sequential performance appears to be top-notch.

The random read/write results from CrystalDiskMark are more representative of the day-to-day workload of an operating system rather than processing large chunks of sequential data (file transfers). With large 512K blocks, the Samsung 840 Pro again led the pack, beating our previous old leader, the Samsung 830. The smaller 4K block size saw it come down to earth somewhat but it was still competitive and stayed within the top three.

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