Total, mine took a couple of hours, because I spent time wiring it, zip tying the cables and such (which I had to undo). But I tried booting it, didn't work, so I had to call EVGA to see if it was my video card (no signal).. I ended up realizing I forgot to plug in one of the power cables, and then I also had to reseat the CPU chip. I'll have some pictures tomorrow when I finish up zip tying the cables.