Installing memory module in DIMM slot on modern PC computer

have you tried checking the socket and Reseating your CPU as if only a single slot is working then my first suspect would be bent Pins in the

A server provides 16 DDR4 DIMM slots Each processor supports eight memory channels and each memory channel supports two DDR4 DIMMs Figure 2-14

slot machine png transparent Each CMOD contains 12 DIMM slots arranged in two groups of six slots Each group of slots is controlled by one of the four memory buffers

slot strike casino An ASUS TUF with so-dimm memory slot! This is a full-size ATX board that is equipped with regular DIMM slots