No, I don't mean the speed itself, the problem is in DPs.
To demonstrate it, I need to know best speed parameters for 4090 with JLP's app.
When I start Kangaroo.exe with default parameters it shows "Grid(256x128)" and speed is about 1.8GH. I remember that speed can be better if use bigger grid, but don't remember best values. I think nobody uses it with default grid size if there are better values.
If you know them, I will explain the problem with exact numbers.