I wish I had, it was Shelby0901 who said he could access 900x RTX4090!
No 4billion per second is slow but that is the best a GPU can do for brute force as far as I know.
Ok than i have miss nothing, i was shocked to read it, also 900 x 4 b seems slow today.
Current algorithms like Kangaroo don`t give u real keys/s information, hence your surprise, the speed of these algorithms is often related more to statistical performance than direct metrics like keys per second.