So i was contemplating this and decided to google and just found link after link of the different memory speeds, progress over the years, etc. But seriously why isn't desktop memory the same size as laptop memory? Surely it would reduce costs as there's about 56% less PCB in laptop DIMM's, and their speeds are almost as fast as desktop and if there was only one standard instead of two, i'm sure that collective R&D could make laptop sized DIMM's reach desktop DIMM's speeds. One standard instead of two manufacturing lines would cut costs as well i'm sure. Sooo, why isn't desktop memory the same size as laptop memory?