I install X9DRD-iF with CPU1 installed only in 1U chassis and going to use riser card to support AOC in slot#6. However, I cannot see AOC OPROM shown in the monitor. Any reason?
According to X9DRD block diagram, the PCI-E x16 is from CPU2. You will need to install CPU1 and CPU2 in order to get PCI-E x16 support from CPU2.