The Cisco Nexus 7000 Series Supervisor 1 modules use either 4 GB or 8 GB of memory. For switches
that have two supervisor modules, each module must have the same amount of memory so that it can
provide redundant services for the other. In order to use 8 GB of memory, a switch must be running Cisco
NX-OS Release 5.1 or later release. If the switch is running an earlier release of Cisco NX-OS, the
supervisor modules must have only 4 GB of memory installed.