Which asus board? Crosshair or prime?
Depending on quality of your CPU IMC and RAM bining you can expect more than that.
I can speak for C6H.
As for numbers - 3466@14-14-14-28 1T is achieved by many (for single rank DIMMs, dual rank is limited to 3333). This is pretty sweet spot as for now - good linear speed and low latency.
Mine (ryzen 1700 + 4x8GB trident Z) can run 3600@16-16-16-38 stable.
Lower timings are possible but effort to stabilize it is not worth it (small speed gain, voltages go up, cold boot becomes more prominent).
But you would need to read how to setup BIOS as it would not run like that out of the box - best place is OCN forum.