We got the X9DRI-LN4F+ MB with one E5-2667 processor, and installed three RAID controller cards on it. Three cards use SLOT 1,3 & 5. But the MB only detects two cards in slot 1 & 3. Please let me know how to change MB BIOS setting for the 3rd controller card.
The PCI-e slots 1, 2 & 3 connect to CPU #1 and the slots 4, 5 & 6 connect to CPU #2, directly. For only one CPU is installed in CPU #1 socket (a must), the PCI-e slot #5 is not connected to the motherboard through the CPU. Please install 2nd CPU if you intend to use the PCI-e slot #5.