If you are one of those people who want to run your high-end gaming PC as a home server as well, then you should be concerned about the power draw of the PC. In the previous blog post, I discussed about things that you can do to lower the power consumption of your existing PC. Since you have already bought the hardware, most of them were software tweaks.
But if you have not yet bought the hardware, we can do a much better job. You can of course apply the same software tweaks to this build as well. I thought the previous article was too long, so I will try to be brief on this one. (But alas, I managed to make it even longer. Sorry for that.)
Please note that I would not be talking about peripheral devices. There is too much to cover and that is way out of scope for this article. I would not even cover displays, because the main target of this article is to build a PC that would also serve as a server while consuming least power doing so - which means, you can simply turn off the display when you do not need it. Further, I would not talk about the chassis either, because it doesn't directly affect power consumption of the PC.
CPU
Buy an Intel IvyBridge CPU. Since we are building a gaming PC, it would be beneficial to buy an unlocked CPU so that you can overclock it. Depending on what you wanna do with your PC, you can either buy the Core i5 3570K or the Core i7 3770K. If gaming is the soul purpose, then go with the i5. If you do some video editing, transcoding and rendering, the Core i7 would be the better choice. "AMD" and "low power consumption" don't go well together these days - (no) thanks to Bulldozer.