Lite On Plextor M5M 0.85-Inch 256GB mSATA Solid State Drive (M5M 256GB) Read/write speeds of 80,000/77,000 IOPS Sequential read/write of 540/430MBs Supports SATA 6Gb/s standard for maximum transfer speeds and compatible with SATA 3Gb/s and SATA 1.5Gb/s Latest server-grade Marvell 88SS9187 controller guarantees fast and reliable operation under high loads. True Speed technology gives sustained long-term performance and prevents SSD speed drop, automatically returning performance to like-new speeds.