Crucial rates the X9 Pro at up to 1,050MB/s for both Sequential reads and writes. In our throughput tests, the drive didn't quite hit those official maximums with a peak read figure of 950MB/s (16MB) with writes peaking at 867MB/s (8MB). Although the tested read/write figures are shy of the official ratings, the drive still offers strong performance.
In the read throughput test, the drive peaked at the at end of the test run (16MB Block) at 950.54MB/s.
In the write throughput test, the Crucial X9 peaked at the 8MB mark with a test result of 867.42MB/s before dropping back slightly to finish the test run (16MB block) at 849.01MB/s.