Crucial MX500 250GB

The Crucial MX500 250GB utilizes a mature SATA III architecture, typically pairing a Silicon Motion SM2258 or SM2259 controller with Micron’s own 3D TLC NAND. The drive integrates a dedicated DRAM cache to maintain the logical-to-physical mapping table, mitigating write amplification and stabilizing random I/O performance. The architecture supports hardware-based encryption and leverages Micron's vertical integration to maximize the saturation of the SATA bus limits, prioritizing sustained throughput over burst speeds. Due to its extended production lifecycle the 250GB SKU has undergone unannounced component revisions moving from 64-layer to 96-layer and 176-layer NAND and controller updates while retaining consistent performance characteristics. It features Integrated Power Loss Immunity using a specialized capacitor array to preserve data-at-rest integrity during unexpected power failures, though it does not provide full data-in-flight PLP.

Key Specifications

• Interface: SATA III (6Gbps)
• Controller: Silicon Motion SM2258 / SM2259 (Revision dependent)
• NAND Type: Micron 3D TLC
• Sequential Speeds: 560 MB/s Read, 510 MB/s Write
• DRAM Cache: Yes (typically DDR3/DDR4)
• Security: AES 256-bit Hardware Encryption, TCG Opal 2.0, IEEE-1667 compliant
• Endurance (250GB): 100 TBW

Hardware Alternatives

• Samsung 870 EVO: The primary direct competitor in the top-tier SATA segment. While the MX500 relies on Silicon Motion/Micron architecture, the 870 EVO utilizes a proprietary Samsung MKX controller and V-NAND. Both drives target the upper limits of the SATA interface with dedicated DRAM caching.
• WD Blue 3D / SanDisk Ultra 3D: These drives function as close performance peers. They typically utilize Marvell controllers paired with BiCS NAND. Like the MX500, they prioritize endurance and sustained write performance over the burst-focused architecture of entry-level SATA drives.
• Kingston KC600: A hardware relative that often shares the Silicon Motion SM2259 controller found in later revisions of the MX500. The KC600 mimics the MX500’s feature set closely, including support for TCG Opal hardware encryption, making them architecturally similar.