A dual in-line memory module (DIMM) cooling apparatus is described. The DIMM cooling assembly includes a first heat spreader to be thermally coupled to respective memory chips of a first side of the DIMM. The DIMM cooling assembly includes a second heat spreader to be thermally coupled to respective memory chips of a second side of the DIMM. The DIMM cooling assembly includes a heat sink element. The heat sink element is to reside above the DIMM. The heat sink element is to receive heat from the first and second heat spreaders. The heat sink element has thermal transfer structures to lower thermal resistance between the heat sink element and the heat sink element's ambient.