In our read throughput test, Crucial's P1 peaked at 1,705.45MB/s at the 4KB block mark before falling back to finish the test at 1,640.77MB/s. Writes peaked at the 2KB block size at 1,677.56MB/s before fading to finish the run at 1,561.92MB/s.
In our throughput tests we couldn't quite match the peak maximum speeds of 2,000MB/s and 1,700MB/s for read and writes respectively as quoted by Crucial. However, the tested write speed was much closer to the official figure than the read speed.
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