There are many examples of 'skunkworks' projects, including an Asus RTX 4060 Ti with an onboard SSD slot, motherboards with rear-side connectors ... But while ATX motherboards with SO-DIMM ...

Introduced in 1995, the ATX was the first PC motherboard to not only include I/O support (serial, parallel, mouse, etc.), but to place all the connectors directly on the motherboard. Prior to the ...