after 6 more hours make update to win10.. (i can't sleep.. here 4:54AM now)

used AMD Driver 12.4.2 >>> i can see my GPU all work in device manager

patch by 'atikmdag-patcher-1.4.7'
switch to compute mode by 'AMD-Compute-Switcher'
but,...
using Phoenix miner 5.2e and 5.3b still same, hashrate still not change like before..
here is the result:
....
any suggestion to make RX480 back to 30Mhs..?
thanks
Remove the -straps command - it is not supported on Polaris GPUs. Then try mining ETC to see the normal hashrate (you need PhoenixMiner 5.3b) when the DAG actually fits in the VRAM.
You won't be able to mine ETH with full speed on 4 GB cards under Windows any more but it will be more like 20-23 MH/s with the current DAG epoch and will go down a little with each new epoch - you will need to let auto-tine to finish in order to see the final hashrate.
wholaaaaa...
after more than 1 day and half make change to Phoenixminer..
now my miner can run and see my rig hashing..