The HDTach software shows the potential read speed and write which you are likely to experience with the SSD. We see the average speed numbers, which tell you what to expect from a given drive in normal, day to day operations.

The drive's read graph is smooth and stable across its entire capacity, and its average read peeds was 446.1 MB/s. The write graph was also smooth but the drives slowed down to about 320MB/s after the 30GB mark, as you see below. Obviously, the drive slowed down as soon as the cache ran out. The overall average write speed was 326MB/s:

The ATTO Disk Benchmark measures storage systems performance with various transfer sizes and test lengths for reads and writes. The benchmark performs file transfers ranging from 0.5 KB to 8192 KB. ATTO can be adjusted to do overlapped I/O, in a variety of queue depths. The test was run with the default runs of 0.5KB through 8MB transfer sizes with the total length being 256MB and QD4. ATTO probably gives the most accurate results for compressible read and write data:

The drive's official Sequential read/write figures for the MX500 500GB SSD are up to 560MB/s & 510MB/s respectively, and the ATTO benchmark confirmed those specs. Crucial's drive was actually faster that the Samsung EVO model in the read test, finishing near the top of the stack regardless of the transfer size.

The MX500 was also very fast in the write test: