Your DIMM1 and DIMM2 Module Organization is not the same

DIMM 3 and DIMM 4 RAM slots won't work dimm 2 slot ROG HS, Adapter to 2 PCIe NVME SSD For ASUS ROG M9A, M10A, R6A, R6E, M12E, x399ZE MB ; SKU: 14794279 ; Manufacturer: ASUS ; MPN: 90MC06D0-M0XCN0 dimm slot not working Between the massive CPU socket, eight DIMM slots, and the absolutely huge VRM heatsink, there really isn't much board vendors can do to create

dimm 2 slot 2 riser card that uses a ninth DIMM-like slot on the right of the slot monsters, thanks to two PCIe slots sitting between the primary ones