However, [moonpunchorg] posted a workable design for an Arduino on a mini PCI Express board. (As [imroy264] points out in the comments, the board is using the USB port present on the PCI-E connector.) ...

I'll be building a new box soon and was looking at some PSU's. Some of them have 6-pin PCI-Express connector, others say that they have 8-pin and some have both. What's the difference? I haven't ...