vs NVME: What's the difference?

is a slot that can interface with SATA , PCI Express

NVMe SSD Explained - vs SSD PowerCert Animated Videos• views · 11:10

nvme m2 ssd 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

nvme and m2 slot difference PCIe but also Gen 4 If you have a single GPU and no other expansion cards, you should be fine with using the lower NVMe slot