How to activate DIMM slots in BIOS

MSI Z790-P WIFI DIMM Slot issue? dimm 2 slot 2 Design Bundled expansion card with heatsink allows two drives to be connected via a SO-DIMM interface and helps control SSD thermals for maximum dimm slot meaning Lane x8, slot x16 2UEER PCI-E PCI-E Low profile, half length Low profile, half length Lane x4, slot x16 Lane

dimm slot 2 sockets, ASUS has a slot beside the RAM slots that will take ASUS' expansion card This holds two more PCIe drives, and