The Lenovo 00D5845 Upgrade 1 can be applied on the Lenovo Flex System Fabric CN4093 10 GB Converged Scalable Switch to boost the external bandwidth with two 40 GbE QSFP+ ports that can be converted into 4x 10 GbE SFP+ links each with the optional break-out cables. This upgrade also enables 14 more internal ports (for a total of 28 internal ports) to provide more bandwidth to the compute nodes by using 4-port expansion cards. This configuration makes full use of the 4-port adapters that are installed in each compute node and requires the base switch.