TOP500 and other similar HPC benchmark lists are only for FP64 computations.
While both NVIDIA and AMD design their top GPU model for both FP64 and AI/ML workloads, to save on the design cost, you can do AI training using GPUs that have only high AI performance (like RTX 4090 or its workstation counterpart, RTX 6000), without implementing FP64 operations at all (the FP64 performance of RTX 4090 is negligible, being worse than of any decent cheap CPU, it is provided only for compatibility in testing).
While both NVIDIA and AMD design their top GPU model for both FP64 and AI/ML workloads, to save on the design cost, you can do AI training using GPUs that have only high AI performance (like RTX 4090 or its workstation counterpart, RTX 6000), without implementing FP64 operations at all (the FP64 performance of RTX 4090 is negligible, being worse than of any decent cheap CPU, it is provided only for compatibility in testing).