The NVIDIA RTX 4060 is the objective winner of this comparison, securing victories in eleven out of fourteen measured specifications. Its most significant advantage over the AMD RX 6400 is its FP32 performance, which is 324% higher. While the AMD RX 6400 maintains a lead in power efficiency with a 54% better TDP, the substantial gap in raw computational capability establishes the NVIDIA RTX 4060 as the superior component across the majority of technical categories.

Users prioritizing maximum computational throughput should select the NVIDIA RTX 4060 for its vastly superior FP32 performance. Conversely, the AMD RX 6400 is the appropriate choice for systems where power consumption is the primary constraint, as it offers a significantly lower TDP. By evaluating these specific advantages, builders can align their choice with either the high-performance requirements of the NVIDIA card or the power-efficient profile of the AMD alternative.