Xbox 1 mainboard

[Mat3]

A quick question to satisfy my curiosity about the Xbox 1 mainboard. There were two extra, empty slots for memory chips (which would be filled for the arcade version). How much do the data paths to those slots add to the cost of the board? I'm guessing it's super cheap??

 

[archie4oz]

The empty pads were because they shared the same motherboard with the devkit (which had twice the memory). That actually saves you money since you're not cranking two different motherboards (one of them being produced in limited numbers).

 

[Mat3]

Thanks, I didn't know that (I assumed it was either for the arcade board).

Any idea how much it added to the manufacturing cost of the board to have those idle empty slots and the bus to connect them?