DDR3 is far from the last word in notebook memory. DDR4 has been under construction at JEDEC since 2005, and the first samples, such as the Hynix modules shown here, started to appear in 2011. The format drops typical input voltage down to 1.2V from DDR3’s 1.5V, and speeds from 2133 to 4266 MT/s are expected. So if you thought your current notebook memory was fast...you haven’t seen anything yet.