Transcend's PCIe SSD 250S is compatible with the latest NVMe 1.4 standard and supports the PCIe Gen4 x4 interface, which means that four lanes transmit and receive data simultaneously. Its 8-channel controller delivers sequential read/write speeds of up to 7,500/6,700 MB/s and IOPS of up to 540,000 (on the 4TB model), resulting in impressive performance and response time for desktop PCs and laptops. Go higher with the new generation of PCIe 4.0 The PCIe SSD 250S features the new PCIe 4.0 specification. It supports a bandwidth of 16 GT/s per lane compared to 8 GT/s per lane for PCIe 3.0. PCIe 4.0 is backward compatible with PCIe 3.0, enabling higher processing speeds for your computer and ensuring lower system latency. For content developers and gamers, this means a smooth and immersive experience with no waiting! Cool and temperature stable The PCIe SSD 250S features an integrated ultra-thin graphene heat sink that effectively improves the heat dissipation of the compact SSD. Graphene's high conductivity cools the system quickly and ensures stable device performance.