Both chips are still far from launch but all current rumors point to the AD102 and Navi31 using more power than the current generation. It's also said that both GPUs will offer at least twice the performance of the current flagship GPUs.
At the same time, Bondrewd, a Beyond3D forum member, who appears to have insider information on AMD Navi 31, left clues on both the size of the GPU’s chiplet as well as power consumption. All these clues were put together by 3DCenter who concluded that Navi 31 might be a relatively big dual-die GPU (600-650 m² for RDNA3 compute chips alone), but this does not account for MCD and other tiles that will supposedly be used by this GPU. The whole processor might be as big as 800mm², as calculated by 3DCenter. Furthermore, Bondrewd also revealed that Navi31 power should not exceed 500W. With the expected GPU size in mind, 3DCenter concluded that the TBP should be around 420 to 450W.