I’ve built quite many computers and the first powerup always fails for some very minor thing, like the psu switch being off, forgetting ram… but last time i got everything right the first time. but it still didn’t go smooth. i powered it on. fans spinning, black screen…i waited and waited…shut it down, tried again. nope, shit. switched rams to different slots. nope. tried with one stick. nope. got frustrated, started filling out the rma form and boom suddenly it posted. turns out it just takes long to post…like ridiculously long. sometimes more than 5 minutes. since it works I’ve been too lazy to take it apart and rma the mobo. I’ll do it just before the warranty expires.