== Chips vs modules == 

 I think this article jumps between describing individual DDR2 SDRAM components and DDR2 DIMM:s in a slightly confusing way. It should be reorganized into a chip/technology part and a DIMM/PC system part, as they are both standardized separately by JEDEC. DDR memory is also used quite a lot for embedded applications, often with components soldered directly to the computer board rather than through a DIMM socket.