The server boards have two identical riser card slots, with a total of 24 lanes of PCIe* 3.0 (PCIe Gen3) routed from the CPUs. If only one CPU is installed, only the first 16 lanes on Riser 1 are available.
- Riser slot 1 has 16 lanes from CPU 1, and 8 lanes from CPU 2.
- Riser slot 2 has 24 lanes solely from CPU 2.
To maximize use of all riser slots, install two CPUs.
This applies to: