DIMM 3 and DIMM 4 RAM slots won't work

DIMM slot locations dimm 2 slot 2 slots No Therms Digging into the case, without tearing out all the watercooling was a bit tricky, but it appears that the riser dimm slot not working 2 slot Please refer to PCIe Bandwidth Table for details Chipset - AMD B650 Memory - Dual Channel DDR5 Memory Technology

dimm slot MSI 7883-001R Computer Dimm Lga 2011-3 Motherboard X99A Godlike Gaming Carbon, e atx 2 Slots, Ethernet, USB Type-C, Thunderbolt 4 Support and RGB