I took me some minutes googling to realize you meant botting
Anyway, I got this build, and it works amazing. It feels fast. It is fast. It looks ugly. Exactly what I was looking for. I can recommend everything except the casing on that build.
Energy efficient? It is not. Can't put it different. If you really want an energy efficient build with high quality silicons etc(made for long term performance without breaks), you have to look into intel Xeon or amd Opteron processors. But these are usually above a normal budget.
e: my build:
https://villavu.com/forum/showthread.php?t=107772
Example of an xeon computer:
http://www.dell.com/us/business/p/pr...workstation/fs
Note that xeon doesnt perform amazing on games, but the processor is never the problem anyway.