The Intel Arc A770 is the objective winner of this comparison, securing victory in ten out of fourteen measured specifications. Its most significant advantage is a 100% lead in shader units compared to the AMD RX 6650 XT. While the AMD RX 6650 XT maintains a 20% advantage in TDP, the Intel Arc A770 dominates the majority of the technical categories, establishing itself as the superior option based on the provided hardware specifications.

Users prioritizing raw computational capacity should choose the Intel Arc A770 due to its substantial lead in shader units. Conversely, those who prioritize power efficiency should select the AMD RX 6650 XT, as it offers a 20% better TDP. Your decision should depend on whether you value the increased shader count provided by the Intel card or the improved power efficiency offered by the AMD alternative.