The Intel Arc A580 is the objective winner of this comparison, securing victory in eight of the fourteen evaluated categories. The most significant advantage held by the Intel Arc A580 is its shader unit count, which is 300% higher than that of the AMD RX 6400. While the AMD RX 6400 falls behind in most technical specifications, it maintains a distinct lead in power efficiency, offering a TDP that is 70% better than its competitor.

Users prioritizing raw processing potential should select the Intel Arc A580 to leverage its superior shader unit count. Conversely, the AMD RX 6400 is the appropriate choice for builds where power consumption is the primary constraint. By choosing the AMD RX 6400, users benefit from a significantly lower TDP, making it the more efficient option for systems with limited power overhead despite the lower overall spec count.