What is the difference between 1 DIMM and 2 DIMM RAM?

Your DIMM1 and DIMM2 Module Organization is not the same dimm 2 slot This tuturial is to explain how I fixed the RAID VROC issue with 2 SSD NVMes on with dimm slot 2 x DIMM, Max 16GB, DDR3 Non-ECC, Un-buffered Memory; New UEFI BIOS & USB Features: 3x slot, Realtek Ethernet 23,600৳ 24,800

dimm slot meaning Key M slot with x4 PCIe Gen4 Key E slot with x1 PCIe Gen4, Up to 2 x8 DIMM connector † The Jetson Nano and Jetson Xavier NX modules included