Future main memory systems will confront the scaling challenges posed by DRAM technology and should adapt themselves to use the emerging memory technologies like Phase Change Memory (PCM, or PRAM).

I was thinking about how the PS4 uses GDDR5 instead of DDR3 for its' memory. Yes I know it has more bandwith then DDR3 does, but doesn't it cost way more? Besides the cost what are other downsides to ...