Desktop ATX motherboards with SO-DIMM memory slots? It's not as silly as it sounds

Sometimes, engineers have some free time on their hands. There are many examples of 'skunkworks' projects, including an Asus RTX 4060 Ti with an onboard SSD slot, motherboards with rear-side connectors, and going back a little further, an ASRock X299 HEDT ITX motherboard, to name just a few memorable examples.

The latter board included SO-DIMM (small outline dual in-line memory module) slots as a way to save space due to the large size of the LGA 2066 socket. It's not the only example of a desktop motherboard with SO-DIMM slots.