The Final Fantasy XIV Endwalker Official Benchmark uses actual maps and playable characters to assign a score to your PC and rate its performance including scene loading times.
The benchmark gives an overall load time as well as loading times by scene.
In the Final Fantasy XIV Endwalker Official Benchmark, the MP600 GS gives a total load time of 9.947 seconds. When it comes to the individual scenes the benchmark uses, the MP600 GS performs the best in the fifth and final scene with a load time of 0.716 seconds.