my first build, it took me HOURS. first I was afraid I tightened the heatsink too tight, then after installing the motherboard into the case I realized it was pointing up torwards the top vents, instead of blowing air out the back fan... oh well I figured best to leave it be since its working and just install a extra fan on the top to help with exhausting from the cpu? I installed everything, was overwhelmed by all of the cables and did a very poor job of cable management, some of them barely reached and are running across my computer like a spider web.. but since nothing is obstructing any fans or looking dangerous I figured i'd just leave that alone also and move on... then.. the critical moment. the power wouldn't start. I reconnected all wiring and waited... tried again and again and IT WORKED after about 10 tries and checking connections! I still don't know why it wouldn't work...I think my psu is just finicky.