Transcend MTE110S NVMe M.2 2280 SSD, PCIe 3.0, 128GB–2TB

Built on a DRAM-less Silicon Motion controller, so it holds its rated figures in bursts but tails off during long sequential writes once the cache is spent. Fine as a boot volume or a games library, poor as a video ingest target.

Gen3 throughout: in a Gen4 slot it functions and simply runs at Gen3. For sustained write work on a Gen4 board, the Transcend PCIe Gen 4 x4 M.2 2280 250S NVMe with Graphene Heatsink keeps a DRAM cache.