Dont they cut the cores off from one side of the wafer and work their way through to the other side? this would mean the first cores assembled would be from the outer edge and be first numbered........they wouldnt wait till they got to the center of the wafer then start numbering them......as an example if theres 144 usable cores on a wafer (smaller scale)and they cut from left to right then move in and cut again. that would be a wafer (that looks like a 12x12 tictactoe grid) from left to right and top to bottom the first cores out would be from the edge, the best cores would be from the center 4 rows leaving 4 rows on the left and right and 4 rows on top and bottom

that leaves 16 cores in the very center numbered 53-56, 65-68, 77-80, 89-92.

the highest numbers off the batch would be the last row cut from wafer.

Unless they start cutting from the middle I dont think cores from the center would have low numbers.

This is just an observation.....i have no idea how AMD cuts their cores.