"The exact location of the processor is not specified. It is recommended that it be located behind the external I/O connectors and to the right of the seventh expansion slot,"
It's hard to be sure from just looking at those pictures but it may well be possible for those heatpipes to slide up and down the case and to also rock from left-to-right, that would mean the CPU could be almost anywhere and the base of the heatsink roof would fit. . .I wonder how they get around the problem of the processor not definatly being in the same place.