I have an old SFF-PC currently as my home server, it does my domain DNS, hosts my e-mail, is my Samba-/SMB-/file-server and hosts an Avorion and Arma3 dedicated

I have an old SFF-PC currently as my home server, it does my domain DNS, hosts my e-mail, is my Samba-/SMB-/file-server and hosts an Avorion and Arma3 dedicated server. It's way more power efficient to have an SFF do all the 24/7 IT-work and my gaming/main-PC only selectively powered up when I need it.