Only One RAM Slot Works: How to Enable The Other Slots

: 8 ram slot motherboard ASUS Tuf Gaming Z790-Plus Wifi Intel Z790 Lga 1700 Atx Gaming Motherboard with 16+1 Drmos Power Stages, Pcie , Ddr4 Ram

This example output shows that the computer has 4 RAM slots , and two 4GB RAM sticks $ sudo dmidecode

which expansion slot is used by an nvme compliant device_ But with 32GB Vengeance RGB PRO SL ram Same slot does not show the ram stick, the second slot from the right Seems like it's a software

which slot is for fabric softener I read in multiple places that RAM could be upgraded to 16MB, so I bought both 4MB and 8MB sticks I have tried multiple configurations with