ship from Japan HD3109 Japanese product Low heat generation and high performance, Ultra Durable M.2 general purpose NVMe SSD Excellent performance up to 2600 MB / s for sequential writes Random read and write performance is improved because it has a high-speed DDR3L DRAM cache and does not need to reserve an overprovisioning area. The DRAM cache acts as a buffer between the controller and the NAND flash, allowing performance to be maintained as capacity is occupied by more data.