Can I Use a PCIe NVMe SSD in a PCIe Motherboard Slot?

In this video, I tested the PCIe gen 3 slots to see if there is any performance difference when

2 supports both SATA and PCIe, an module may only be inserted in either one of the two interfaces, so check your motherboard documentation

m2 sata vs nvme slot The lower slot on the Asrock board is using one of the SATA lanes So you won't get any speed advantage PCIe pastedImage_2

m2 slot mainboard For example, inserting a PCIe card on a PCIe slot will give you PCIe performance NVMe SSDs connect to the motherboard using