Different Types of M2 SSD SATA or NVME

What is the difference betwen SATA and PCIe drives? The main difference is that PCIe and SATA drives have different controllers PCIe is the faster

No M2 is just a form factor storage device that says nothing about the data transfer interface NVMe is a specification for access protocols

nvme in pcie 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 40 in 30 slot No M2 is just a form factor storage device that says nothing about the data transfer interface NVMe is a specification for access protocols