What does the X4 mean in an PCIe Gen X4 NVME drive?

The bottom slot supports both PCIe and SATA SSDs and runs the slot with 4x PCIe lanes

I am unable to use my 2nd SSD i bought I bought a second 2 TB 980 pro sdd and it shows up in

where is the gold slot Yep, simply a smaller physical size, which means fewer PCI-E slots, and often one less slot motherboard-with-m-2-shield-frozr) As

where does the money from the lottery come from The bottom SATA SSD is on , which replaced mSATA in new products See mSATA Sockets On the Motherboard Modern desktop PC motherboards have dedicated