No, 16GB at 3600MHz isn't sufficient for the Ryzen 9 5900X during gaming.
No, 16GB at 3600MHz isn't sufficient for the Ryzen 9 5900X during gaming.
No, 16GB at 3600MHz isn't sufficient for the Ryzen 9 5900X during gaming.
The processor doesn't affect memory usage. However, it does matter. Your current activity level impacts performance. For ages 14 and above, aim for 32; lower ages can handle 16.
Launch Task Manager, tap More Info at the lower left corner. Navigate to the Memory category.