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 built a box with PCI-Express before. Also some have SATA power ...

The Xbox One is a nightmare to work on; once you pop off the shroud, you yank out the ribbon used to active the power button ... a few pics of the Xbox One S' 6-pin internal PSU, too: To ...