Appearance Dimensions Double-sided: 80 mm x 22 mm x 3.58 mm (3.15" x 0.87" x 0.14") Weight 10 g (0.35 oz) Type M.2 2280 Interface Bus Interface NVMe PCIe Gen3 x4 Storage Flash Type 3D NAND flash Capacity 256 GB / 512 GB / 1 TB / 2 TB Operating Environment Operating Temperature 0°C (32°F) ~ 70°C (158°F) Operating Voltage 3.3V±5% Performance Sequential Read/Write (CrystalDiskMark) 2 TB up to 3,500/2,900 MB/s 1 TB up to 3,500/3,200 MB/s 512 GB up to 3,500/2,500 MB/s 256 GB up to 3,300/1,250 MB/s 4K Random Read/Write (IOmeter) 2 TB up to 340,000/360,000 IOPS 1 TB up to 330,000/370,000 IOPS 512 GB up to 190,000/360,000 IOPS 256 GB up to 190,000/300,000 IOPS Terabytes Written (TBW) 2 TB 4,400 TBW 1 TB 2,200 TBW 512 GB 1,100 TBW 256 GB 550 TBW Mean Time Between Failures (MTBF) 2,000,000 hour(s) Drive Writes Per Day (DWPD) 1.2 (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 / 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 (additional driver required) Microsoft Windows 8 (additional driver required) Microsoft Windows 10 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. Technology S.M.A.R.T. Advanced Garbage Collection RAID Engine LDPC Coding DRAM Cache Supreme transfer speeds Transcend's PCIe SSD 220S follows NVMe 1.3 and utilizes the PCIe™ Gen3 x4 interface, meaning four lanes are used for transmitting and receiving data simultaneously. Its 8-channel controller supports ultra high data throughput, resulting in compelling performance of up to 3,500MB/s read and 3,200MB/s write. Note: Performance is based on CrystalDiskMark v5.0.2. Understanding the PCIe interface PCIe (or PCI Express®) is a much faster interface than SATA (or Serial ATA) for connecting a host computer to solid-state storage devices over one or more lanes consisting of one transmit and one receive serial interface in each lane, meaning it can better fulfill new performance requirements. Understanding the NVMe standard NVMe (or NVM Express®) is a host controller interface standard designed to address the needs of enterprise and client applications that utilize PCI Express-based solid-state storage. NVMe calls for better performance vectors than AHCI (Advanced Host Controller Interface), including scalable bandwidth, increased IOPS, and low latency. 3D expansion to break through limits Unlike planar NAND memory, 3D NAND flash features memory cells stacked vertically in multiple layers. 3D NAND overcomes density limitations of 2D planar NAND, and delivers a higher level of performance and endurance. Better endurance, higher reliability Transcend's PCIe SSD 220S is engineered with LDPC (Low-Density Parity Check) coding, a powerful ECC algorithm, to keep data secure. Manufactured with high-quality 3D NAND flash chips, and engineered dynamic thermal throttling mechanism, the PCIe SSD 220S guarantees superior endurance and stability for high-end applications. SSD Scope software Transcend SSD Scope is advanced, user-friendly software that makes it easy to ensure your Transcend SSD remains healthy, and continues to run fast and error-free by determining the condition and optimizing the performance of your drive. Learn more Guaranteed quality To ensure the utmost level of quality, Transcend SSDs undergo rigorous testing at all stages of production, including tests for vibration, temperature and humidity, speed, and functionality.