Just a report on v1.7.1
GPU : RX 470/480/570/580
Driver : 18.6.1
OS : Windows 64
Algo : Haven
ON GPU with 4GB memory (single thread), the hashrate is highest compared to other miner and stable.

ON GPU with 8GB memory (dual threads), if lucky the hashrate is the highest compared to other miner. (about 50 more)
To reach the highest hasrate(1xxx), we must not touch the rig after start but:
1. if we are not lucky, it may not reach the highest hashrate, it is only 8xx-9xx
2. unstable if we remote the computer using teamviewer, "sometimes" the hashrate will drop and not going up again
3. on some cards the hashrate will reduce overtime to 8xx-9xx and stay at that point
I have done using "fragment"=9999 with different Intensity from 52-59, worksize 8 and 16
Thanks