Transcend's PCIe M.2 SSD MTE400S has a compact form factor and high-quality 3D NAND flash, making it easy to upgrade Ultrabooks, lightweight notebooks, tablets, and handheld gaming PCs. It is designed with multiple firmware optimization technologies, including SLC caching and LDPC ECC mechanism, which improve storage reliability and extend the drive lifespan. The MTE400S is a great choice for boosting the performance of modern work platforms. Appearance Dimensions Single-sided 42 mm x 22 mm x 2.23 mm (1.65" x 0.87" x 0.09") Weight 5 g (0.18 oz) Type M.2 2242 Interface Bus Interface NVMe PCIe Gen3 x4 Storage Flash Type 3D NAND flash Capacity 256 GB Operating Environment Operating Temperature 0°C (32°F) ~ 70°C (158°F) Operating Voltage 3.3V±5% Performance Sequential Read/Write (CrystalDiskMark) up to 2,000/1,000 MB/s 4K Random Read/Write (IOmeter) up to 60,000/240,000 IOPS Terabytes Written (TBW) 100 TBW Mean Time Between Failures (MTBF) 2,000,000 hour(s) Drive Writes Per Day (DWPD) 0.21 (5 yrs) Note Speed may vary due to host hardware, software, usage, and storage capacity. The workload used to rate DWPD may be different from your actual workload, which may vary due to host hardware, software, usage, and storage capacity. Terabytes Written (TBW) expresses the endurance under the highest capacity. Some motherboards only provide PCIe x2 connections for the M.2 slot, creating a bottleneck on even the fastest drives. Warranty Certificate CE/UKCA/FCC/BSMI/KC/RCM Warranty Five-year Limited Warranty Warranty Policy Please click here for more information about the Transcend Warranty Policy. Warranty does not apply when SSD Scope's lifetime indicator displays 0% within the warranty coverage. System Requirement Operating System Microsoft Windows 7 or later Linux Kernel 2.6.31 or later Note Systems for use with the PCIe M.2 SSD must have an M.2 connector with only an M key. B-key connectors are not compatible. Improper insertion may lead to damage. Please click here for more information.