Silicon Power UD90 PCIe Nvme Gen4x4 M.2 2280 internal solid state drive (SSD) achieves improved sequential read/write and random read/write performance with support for SLC Caching. With support for NVMe 1.4 and Host Memory Buffer (HMB) technology, the UD90 offers uninterrupted productivity via higher performance and lower latency. The UD90 offers a range of capacities from 128GB to 4TB.