Microelectronic assemblies, related devices and methods, are disclosed herein. In some embodiments, a microelectronic assembly may include a package substrate, having a surface, including a first conductive pathway electrically coupled to a power source; a first microelectronic component, having an active side electrically coupled to the surface of the package substrate and an opposing back side, surrounded by an insulating material; a second microelectronic component, having an active side electrically coupled to the surface of the package substrate and an opposing back side, surrounded by the insulating material and including a through-substrate via (TSV) electrically coupled to the first conductive pathway; and a redistribution layer (RDL), on the insulating material, including a second conductive pathway electrically coupling the TSV, the second surface of the second microelectronic component, and the second surface of the first microelectronic component.