The Crucial MX300 was a solid-state drive in the 2.5" form factor, launched in June 2016, that is no longer in production. It was available in capacities ranging from 275 GB to 2 TB. This page reports specifications for the 525 GB variant. With the rest of the system, the Crucial MX300 interfaces using a SATA 6 Gbps connection. The SSD controller is the 88SS1074 Dean from Marvell, a DRAM cache chip is available. Crucial has installed 32-layer TLC NAND flash on the MX300, the flash chips are made by Micron. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. The cache is sized at 42 GB, once it is full, writes complete at 250 MB/s. The MX300 is rated for sequential read speeds of up to 530 MB/s and 510 MB/s write; random IO reaches 92K IOPS for read and 83K for writes.
At its launch, the SSD was priced at 130 USD. The warranty length is set to three years, which is above average, but shorter than the five years offered by many other vendors. Crucial guarantees an endurance rating of 160 TBW, a relatively low value compared to other SSDs.