SATA SSD vs PCIe NVMe Older Computer

NVME M2 drives: which slot to use? nvme and m 2 slot difference The quick answer to the NVMe versus question is that there is no versus at all NVMe is the interface, and is the latest form factor for nvme m2 slot The only distinction would be TLC, which results in 3 bits being stored per cell, and usually results in slightly lower speed and durability

nvme gen 4 in gen 3 slot ON your board, the slots support both SATA & NVME but not at all speeds this means top slot likely supports PCIe 4 and bottom supports PCIe