U can use this rom. This is Uber Timings ver 3.1 for 2000 Strap
https://www.mediafire.com/?a1d0y7n34dv3j3a
Its not working https://www.mediafire.com/?a1d0y7n34dv3j3a
I use this for all my ASUS STRIX RX480 8 GB (Samsung Memory)
Flash at Command Line
"Atiflash -f -p 0 AsusStrixRX480_Uber31.rom"
I fixed problem, problem was in driver.