Abstract: A package substrate has a substrate surface and a chip region on the substrate surface. The package substrate includes circuit layers, conductive vias, and byte region rows. The circuit layers are sequentially spaced below the substrate surface. Each conductive via is connected to at least two of the circuit layers. The byte region rows are arranged side by side sequentially from an edge of the chip region to a center of the chip region, and each byte region row includes byte regions arranged in a row. Each byte region includes pads located on the circuit layer closest to the substrate surface. The pads of the byte regions of the byte region row closer to the edge of the chip region extend from the chip region to an outside of the chip region through traces of the circuit layer closer to the substrate surface.