The NVIDIA RTX 4090 is the objective winner of this comparison, securing victory in ten out of fourteen measured categories. Its most significant technical advantage over the AMD RX 6750 XT is its shader unit count, which is 540% higher. While the AMD RX 6750 XT holds its own in specific areas, the sheer scale of the architectural superiority found in the NVIDIA RTX 4090 makes it the dominant component across the majority of the evaluated specifications.

Users prioritizing raw processing power and the highest density of shader units should choose the NVIDIA RTX 4090 for their system. Conversely, the AMD RX 6750 XT is the appropriate selection for those who specifically require the 71% advantage in memory clock speed provided by that card. Your final decision should depend on whether your workload benefits more from the massive shader count of the former or the superior memory clock frequency of the latter.