The 12Gb is totally senseless.
You cant put it on DDR3 controller without impacting speed (16Gb, not 12, and still...). You cant put it elsewhere on the board (come on, where do you put it? Between NB ans SB? on PCIE?
You cant re-project your motherboard, redesign it, re-test it, reprint it, re-attach all components in so little time.
Really, I would have expected something crazy like 16Gb ddr3, or out-of-spec DDR3-2800...
But discussing on 12Gb is... really odd.
Ah, and meanwhile re-do a full DRM in 2 months (my fav. part, as its real)
There is a "tech" thread about Xbox One rumors, maybe you can help with your knowledges there.