Galileo gen 1 and gen 2
The best in depth explanation of the technical differences between Intel Galileo gen 1 and gen2

is located not at the official web site, but here. The official web site contains schematics, datasheets, etc, but it is too boring.

is located not at the official web site, but here. The official web site contains schematics, datasheets, etc, but it is too boring.