Is there a way to determine if my slots are running x2 or x4 lanes?

Generally speaking, if you install an SSD in the chipset slot, you're going to see it use 2 lanes worth of bandwidth most of the time

This 2-in-1 SSD PCIe Adapter is a multi-functional NVMe conversion card, which can support the PCIe protocol NVMe SSD to connect directly to the

m2 pcie 40 in 30 slot A Samsung SSD that can use up to four PCIe lanes The numerical naming convention is used to define the size and functionality of the card, here is how:

m2 sata slot 2 slots with x4 PCIE lanes each