Comment by projektfu
They did mention that they stash extra cores to enable the re-routing. Those extra cores are presumably unused when not routed in.
They did mention that they stash extra cores to enable the re-routing. Those extra cores are presumably unused when not routed in.
If the system were broken down into more subdivisions internally, there would be more cores dedicated to replacement. It seems like it could be more difficult to reroute an entire row or column of cores on a wafer than a small block. Perhaps, also, they are building in heavy redundancy for POC and in the future will optimize the number of cores they expect to lose.
That was my first thought but based on the rerouting graphic it seems like the extra cores would be one or two rows and columns around the border which would only account for ~4000 cores.