A thermal module adapted for a desktop personal computer is provided. The desktop personal computer comprises a housing, a power supply, and a motherboard, the power supply being located inside the housing, and including a fan having an outlet oriented toward an outside of the housing, and the motherboard being located inside the housing, and including thereon a plurality of electronic elements. The thermal module comprises a first heat sink, an adjustment device, a first heat pipe, a second heat sink, and a second heat pipe. The first heat sink is disposed on one of the electronic elements. The adjustment device is slidably and thermally connected to the first heat sink by the first heat pipe, and is slidably and thermally connected to the second heat sink, located outside the housing at the outlet of the fan, by the second heat pipe.