In Settings -> Software & Updates -> Additional Drivers tab this window appears (for me):
I have no idea what second driver name: Unknown:Unknown is. The option to use Intel microcode for Intel CPU was intriguing so I picked it and rebooted.
Looking at my Conky monitor:
I think the system is running cooler, CPU percentage and average load factor are a little bit lower.
Other than the fact Ubuntu developers can't vet the source code, are there any pitfalls with using Intel Microcode? Does anyone know how to find out what the "unknown device" is? ie CPU, Integrated Graphics GPU, Wifi card, USB controller, Memory Bus, etc. Could it be Ubuntu doesn't know specific details about my system and I can add it to a file?
@karel pointed out links to duplicate questions about Intel Proprietary Microcode however, none of them ask about the title of "Unknown:Unknown". It would be nice, for me at least, to change this to something more meaningful.
@Pilot6 pointed out this is not a "Driver" but rather "CPU Firmware". I have changed the word "driver" to "title" in Edit 1. Also in comments below; in order to change the title "Unknown:Unknown" requires downloading source code, modifying it and recompiling.