An apparatus is described that includes a semiconductor die package. The semiconductor die package includes a semiconductor die package substrate having a top side and a bottom side. The semiconductor die package includes I/O balls on the bottom side of the semiconductor die package substrate. The I/O balls are to mount to a planar board. The semiconductor die package includes a first semiconductor die mounted on the bottom side of the semiconductor die package substrate. The first semiconductor die is vertically located between the bottom side of the semiconductor die package substrate and a second semiconductor die that is a part of the semiconductor die package.