The Crucial MX500 500GB SSD Review: A Second Lookby Billy Tallis on February 2, 2018 9:30 AM EST
Sequential Read Performance
Our first test of sequential read performance uses short bursts of 128MB, issued as 128kB operations with no queuing. The test averages performance across eight bursts for a total of 1GB of data transferred from a drive containing 16GB of data. Between each burst the drive is given enough idle time to keep the overall duty cycle at 20%.
The Crucial MX500 is tied with the BX300 for fastest burst sequential read performance from SATA SSDs in this capacity range, even managing to beat the Samsung 860 PRO by a few MB/s.
Our test of sustained sequential reads uses queue depths from 1 to 32, with the performance and power scores computed as the average of QD1, QD2 and QD4. Each queue depth is tested for up to one minute or 32GB transferred, from a drive containing 64GB of data.
The sustained sequential read performance of the MX500 is much better than the MX300, but still not up to Samsung's level, and the 500GB MX500 is significantly slower than the 1TB model on this test.
Crucial's power efficiency on the sustained sequential read test is still poor, and the 500GB MX500 is worse off than the 1TB model. Meanwhile, Samsung has significantly raised the bar with the 860 PRO.
Unlike the 1TB MX500, the 500GB MX500 hits its full sequential read performance at QD1, but neither can maintain it through the entire test. The 1TB and 500GB models use almost exactly the same amount of power, but the 1TB model is significantly faster.
Sequential Write Performance
Our test of sequential write burst performance is structured identically to the sequential read burst performance test save for the direction of the data transfer. Each burst writes 128MB as 128kB operations issued at QD1, for a total of 1GB of data written to a drive containing 16GB of data.
The burst sequential write performance of the Crucial MX500 is tied with the Samsung 850 EVO for being the fastest result from a TLC SSD. The 500GB MX500 scores slightly higher than the 1TB model, and is a big improvement over the MX300.
Our test of sustained sequential writes is structured identically to our sustained sequential read test, save for the direction of the data transfers. Queue depths range from 1 to 32 and each queue depth is tested for up to one minute or 32GB, followed by up to one minute of idle time for the drive to cool off and perform garbage collection. The test is confined to a 64GB span of the drive.
On the sustained sequential write test, the MX500 actually performs slightly worse than the MX300, but again the 500GB MX500 is a bit faster than the 1TB model. What was a tie between the MX300 and the 850 EVO last year is probably going to be a small but clear win this year for the 860 EVO over the MX500, but against other TLC drive the MX500 still looks great.
The two capacities of the Crucial MX500 show the same power efficiency during the sequential write test. They're less efficient than the MX300 was, but still near the top of the chart.
By QD4 the 500GB Crucial MX500 is almost at its full sequential write speed, and its performance steadily gains the last few percent over the rest of the test. At lower queue depths, the MX500 is actually slightly slower than the MX300, but the MX300 couldn't retain its performance for the entire test.