extreme power saving possible?

[rando]

Hi,
I have a corebooted Supermicro X9SAE-V, Xeon E3-1290 v2 and one Silicom PE2G6I35-CX with a nvme drive in a PCI-E slot.
I would like to force it into the deepest possible power saving state as I'm not doing any crazy traffic shaping and I believe even on the lowest frequency the hardware would be adequate.
How can I do that under opnsense? And will the power saving be the same/better than under Linux? Supposedly FreeBSD 13 has had some improvements?

[analog]

BSD will likely never give you the best possible power savings, but you can enable PowerD and set it to the minimum profile if you haven't already. There may also be some other power-related settings in the 'tunables' menu.