Not sure if it's what he means, but in my experience 'High density' refers to less chips for a given capacity. When I used to sling PC hardware, as memory dens

Not sure if it's what he means, but in my experience 'High density' refers to less chips for a given capacity. When I used to sling PC hardware, as memory densities increased, you would run into things like 'This Motherboard will only take a 256MB module if it has 8 chips on both sides (16 chips total), it will not take a 256MB module with 8 chips on one side (8 chips total)' Depending on the board, it might only register part of the capacity and be stable, might register part of the capacity and be unstable, or just not boot at all.