woah there, you are talking crazy talk.
a server means a lot of different things to a lot of different people. Is this a home server? small business server? or an enterprise server?
What OS do you intend to use? Win Home Server? Small Business Server? Some Linux distro?
Let's assume for a moment that this is a home server. That means that you will have at most gigabit Ethernet in the house which has a maximum theoretical bandwidth of 120MB/s, and a practical limit somewhere around 110MB/s. Most Pentium 4 processors with a basic onboard RAID controller can saturate that kind of bandwidth very easily, you do not need an i7 for this type of application. If you have more than 2-3 concurrent users on a home system then I would upgrade to a Pentium D or Core2Duo with a duel ethernet card installed to handle that extra load.
At any rate, disabling features in the Bios is not going to help you with power savings or overclocking. Keep all the power saving states active so that you are not running full tilt 24/7. The power will be there when you need it, and then let the poor thing rest when it can. If you are really desperate for that kind of processing power then you need to get off of home use hardware and look into a duel Xeon setup.