The NVIDIA RTX 3090 is the objective winner of this comparison, securing a lead across the majority of the evaluated specifications. Its most significant advantage over the AMD RX 6650 XT is its shader unit count, which is 413% higher. While the AMD RX 6650 XT holds its own in several categories, the sheer scale of the architectural advantage provided by the NVIDIA RTX 3090 makes it the superior option based on the total number of winning metrics.

Users prioritizing raw processing power and the massive shader unit advantage should select the NVIDIA RTX 3090 for their build. Conversely, the AMD RX 6650 XT is the appropriate choice for those who specifically value the 80% higher memory clock speed provided by its configuration. Choosing between these two components depends entirely on whether your specific requirements align more closely with the high-capacity shader architecture of the former or the memory clock performance of the latter.