Adinnieken on 25 July 2013
I don't think it's a RAM reduction.
I think they're running into timing issues with memory or possibly a memory flush issue.
Microsoft briefly hinted at the reasons why they chose DDR3 in their technical briefing and it had to do something with the amount (size of the chunks) of data being moved around, and the way DDR3 works, versus GDDR5.
