By default, Blockchain driver was on compute mode when you on mining, when you are using Andrenalin, you need to switch manually.
A lot of experienced miners here always mention about dummy video output for AMD cards when that card was dropping hashrate, maybe you can try it.
Topic: rx 4704gb 17mh/s in eth (Read 153 times)
As above you should look for the compute mode setting and change that it will make a big difference, also have you tried https://forum.ethereum.org/discussion/17617/atikmdag-patcher-1-4-7-latest-version although I'm not sure if you need to when using blockchain drivers but maybe worth a try 
If you are using the latest Adrenaline driver you need to toggle each card to Compute mode from Graphics mode in AMD settings.
https://support.amd.com/en-us/kb-articles/Pages/DH-024.aspx
https://support.amd.com/en-us/kb-articles/Pages/DH-024.aspx
3 months ago my rx 470 4gb were giving me 27+mh/s.
and today i tried mine eth with those cards and i am getting only 17 mh/s.
i am using latest blockchain drivers and even i tried many drives but not succeed.
even i fresh installed the OS windows 10
please help me.
and today i tried mine eth with those cards and i am getting only 17 mh/s.
i am using latest blockchain drivers and even i tried many drives but not succeed.
even i fresh installed the OS windows 10
please help me.
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