Stupid errors you have made when putting together a new rig

[Atlantean]

When I went to turn on the new system I built last night I forgot to turn on the power on the PSU before powering up... so I thought that there must be something wrong with one of the components and opened the case and started checking all my connections. Everything appeared to be fine so I tried powering up again... still nothing, then I checked the psu and it was off, I felt really stupid. What are some stupid mistakes you have made on your new builds? Broken parts, forgot to plug something in?

 

[wwswimming]

leaving the fan off the CPU on my Abit IC-7 Max 3. it actually started up and i
went to install the OS - and then - IT BLEW UP !

no, just kidding. the CPU was really hot, i swore a little, put on the fan, and
was amazed that it still ran. it still runs ... i have Pro-E on it.

 

[pkme2]

The dumbest thing I did on a new rig at powerup was not connecting my hdd power. Imagine my surprise when I saw no hdd present. I thought something really serious happened to my new build. Nevertheless, I'm still learning.

 

[Lonyo]

Had 2 optical drives hooked up, but both were set to master, so they didn't work

 

[ForumMaster]

hmm, the only thing i can think of ws when i built my dad's computer. it wan only my second build and i connected all the case wires hirizontaly instead of vertically. it quite obviously didn't work. i figured it out pretty quickly though.

 

[KeithTalent]

I still don't know where to connect the firewire on my mobo, and I built my rig a couple months ago

 

[lxskllr]

I hooked up the usb headers wrong and fried 2 digital cameras and a mp3 player before I realized my stupid mistake.