There is still a lot of confusion about what all is on a typical motherboard and I found this breakdown that might help explain some of it. Hope this helps,,,
http://i2.squidoocdn.com/resize/squi...otherboard.jpg
And while I was digging around I found a pic of a motherboard out of an XBOX.
http://pictures2.xbox-scene.com/versions/v1.1/top1.jpg
