DIMM 3 and DIMM 4 RAM slots won't work

ram slot 3 and 4 not working   Dan rambo 168 slot

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slot motherboard ram slots not working on motherboard 8 ram slots 8 ram slot motherboard - 4 x DDR4 DIMM Slots - AMD Ryzen series CPUs support DDR4 3200 2933 2667 2400 2133 ECC & non-ECC, un-buffered memory*

what is the ugga bugga slot machine The problem may occur because the system BIOS is outdated If you have an older computer, the system may be unable to access all the installed RAM In this case I could even enable the XMP profile and run the ram at 2133 no problems at all Also i'v test each stick of ram individually and found no problems, also