Here is the link: http://www.asus.com/ca-fr/Desktops/CM6870/specifications/
Don't worry I have an i7 3770, 16GB of RAM
I understand the PSU issue that I get if I want to upgrade, I'll buy a corsair CX750M
I was pricipally worrying about the space that I would get to plug my PCI-E plug, I semms very very thight in a 17.3cm large case