Above and right is a Dell Dimension 8400 motherboard. This was their top of the range computer not so long ago. We put it in a standard ATX case and it uses a standard power supply. Its now a LAMP server for web development. Dell went over the top with the cpu cooler but it works well.
Ever wondered if you could put a standard notebook slimline dvd-rw into a G5 iMac? You can but it means some modifications. At left is the cover dvd from a computer magazine. Below is the dvd web page on the G5 screen. Works well and it will never eat a dvd again.