HD Tune Pro - Sequential Performance
Version and / or Patch Used: 4.55
The highest we've achieved in the sequential read test was 480 MB/s from the SanDisk Extreme II. The bar is set there. The Crucial M550 256GB peaked at 455 MB/s in HD Tune Pro's 64KB sequential read test. Although not the fastest, it's still very high and the average performance of 454.4 MB/s is in line with several other drives on the chart.
The write test on the M550 256GB shows the drive slowing to an average just under 330 MB/s. In the next test, we'll see why the maximum sequential performance is so high but the average and minimum is so much lower.
HD Tach - Sequential Write Performance after Random Writes
Version and / or Patch Used: 18.104.22.168
Here we see the Crucial M550 256GB's sequential performance after a light hit of random writes. The drive drops considerably after subjected to random writes. We see this quite often with newer SSDs but rarely to this extent.
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