SanDisk X400 256GB M.2 SATA 6Gb/s Solid State Drive

Model: SD8TB8U-256G-1122 | 256GB Capacity | M.2 2280 Form Factor | SATA III

The SanDisk X400 (SD8TB8U-256G-1122) is the M.2 version of the popular X400 series. Unlike the 2.5-inch version, this model utilizes the M.2 2280 (80mm) "gumstick" form factor, designed for modern ultra-thin laptops and motherboards with dedicated M.2 slots. It uses the SATA III interface rather than NVMe, making it a highly compatible and power-efficient choice for general computing and corporate environments.

📊 Technical Specifications

• Capacity: 💾 256 GB

• Interface: ⚡ M.2 SATA 6Gb/s (B+M Key)

• Form Factor: 📏 M.2 2280

• NAND Type: 🧠 SanDisk 15nm TLC

• Sequential Read: 🏎️ Up to 540 MB/s

• Sequential Write: ✍️ Up to 520 MB/s

• Random Read/Write: 📉 93,500 / 60,000 IOPS

• Endurance (TBW): 🛡️ 80 Terabytes Written

• MTTF: 🕒 1.75 Million Hours

✅ Product Overview

• nCache 2.0 Technology: Employs a tiered caching structure that treats a portion of the TLC NAND as high-speed SLC to handle bursty write operations, improving overall system responsiveness.

• M.2 SATA Versatility: Because this is a SATA-based M.2 drive (B+M Key), it is compatible with older M.2 slots that do not support the faster NVMe (PCIe) standard, making it an excellent "universal" upgrade for older laptops.

• Reliable DataGuard: Includes advanced error correction and "DataGuard" technology to ensure that data remains safe from corruption over the life of the drive.

• Low Power Footprint: The X400 is known for its class-leading low power consumption, which significantly helps extend battery life in portable devices.

📦 Compatibility & Use Case

• Target Systems: Primarily used in Ultrabooks, Chromebooks, and Small Form Factor (SFF) PCs like the Intel NUC. This specific PN is frequently found in Dell Latitude and HP EliteBook systems.

• Ideal Workloads: Fast Windows/ChromeOS boot-up, office productivity (Microsoft 365, Google Workspace), and web-based applications.