http://pcpartpicker.com/p/1Xy1F
I am thinking of building a small system that I can put in my backpack. As far as I am aware all the parts will fit, be sufficiently powered, and won't choke if I take out the unused Expansion slots on the back for the Gpu. I am not looking to do any overclocking. Any red flags besides cooling? I also don't know if the PSU has a efficiency rating.