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CrystalDiskMark — transfer rates
TR regulars will notice that we've trimmed a few tests from our usual suite of storage results. The drives were all benchmarked in the same way, but we've excluded the results for tests that have grown problematic or less relevant over time. This may be the last review to use our current suite and test systems. We've already started testing drives on new rigs—and with a fresh batch of benchmarks. Stay tuned for those results soon.

First, we'll tackle sequential performance with CrystalDiskMark. This test runs on partitioned drives with the benchmark's default 1GB transfer size and randomized data.

We've color-coded the results to make the BX100 and MX200 easier to spot. The M600 is highlighted in a separate shade, providing a reference point for the MX200's Micron counterpart. Crucial's older SSDs are also colored to set them apart from the rest of the fray.

The BX100s make an impression right off the bat, posting nearly the fastest sequential read speeds we've ever measured. The MX200s aren't far behind.

CrystalDiskMark's sequential write speed test turns the tables somewhat. Although the MX200s remain comfortably in the middle of the pack, just behind the fastest contenders, the BX100s tumble down the standings. The 250GB drive is the hardest hit, though it's still faster than the equivalent MX100, Crucial's previous budget leader.

HD Tune — random access times
Next, we'll turn our attention to random access times. We used HD Tune to measure access times across multiple transfer sizes. SSDs have near-instantaneous seek times, so it's hard to graph the results on the same scale as mechanical drives. The WD Black and Seagate SSHD will sit out this round to focus our attention on the SSDs.

Most of the SSDs are evenly matched, with access times ranging from instantaneous to slightly more instantaneous. It's hard to get excited about differences of only a few microseconds.

The field spreads out a little in the 1MB write test, though. The MX200 250GB turns in the slowest time of the bunch, and the M600 256GB isn't much faster. Odds are Dynamic Write Acceleration is at fault.

The BX100 250GB isn't exactly a speed demon with 1MB random writes, either, but it's way quicker than the equivalent MX200 and slightly ahead of the MX100.