A couple of days ago,
I decided to try updating the microcode of my Intel CPU. You need to do this each time you boot your computer, because it gets lost again when powering down your system. On the Gentoo Wiki an easy How-to can be found. For updating the microcode you need to compile in microcode support in the kernel and and do “emerge -av microcode-ctl” after this you need to add the daemon to the startup scripts and voila your microcode gets update each time the OS starts. Compiling microcode support as module allows the script to unload it, when it is finished.
The microcode that is provided by the installed package is not the latest. The latest version can be found on download site of intel and needs to placed in the /etc/microcode.dat.
I didn’t notice any difference yet, but it might give a warm felling inside, to know that it’s up to date 
I am only still pondering if I need to manually run the script again when resuming from hibernation.