I have installed an M.2 SSD, the Samsung XP941 MZHPU512HCGL-00000.
HWInfo shows the M.2 SSD as being installed with a 6Gb/s SATA controller. See attached screenshots. From what I understand, this was to be installed as a M.2 PCIe.
I would like to know if HWiNFO is capabale of identifying...