For Samsung PM9A1 PCI E 4.0 PCIe 2280 M.2 NVME SSD 2TB 1TB 512GB 256GB Internal Solid State Drive Hard Disk HDD Compatible PC|Printer Parts| - AliExpress
Just ran disk mark against my two drives. Both are hitting their rated speeds at PCIe 3.0 x4. 1TB Samsung PM9A1 (stock main) and 2TB Pioneer APS-SE20Q-2T (added secondary). So it doesn't