Asus R4F only 3 of 4 dimm slots working?

Ram Slot Not Working After CPU Upgrade ram slot 3 and 4 not working Check the CPU socket as the newer CPUs the memory controller is in the CPU and if a pin is bent or missing it could make a slot not work 513 ramai123 slot 7PCIe slots Up to300Wauxiliary power One PCIe x4 gen 3 Apple IO card Four PCIe x8 gen 4 Two single height Two double height Two PCIe x16 gen 4 Double

rams slot receiver B550M DS3H ; 1 Solid Pin Power Connector ; 2 DVI ; 3 DisplayPort + HDMI ; 4 Realtek GbE LAN ; 5 Ultra Durable PCIe Slot · PCIe® Slot · Running 1*