Cisco UCS Manager is showing that servers with Integral memory modules have “Invalid FRU” DIMMs installed. What does this mean?

The Cisco UCS Manager uses a catalogue system to identify DIMMs. In some situations, for example where the UCS Catalogue in service is not the most recent, or if the Integral components are not recognised, then these messages will be reported for servers with Integral memory installed.

However, there is absolutely no impact on the memory performance and these messages can be safely ignored.