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1. Windows 10 and Adrenalin 18.4.1 detected my RX 570's as RX 580's. Apparently downgrading Adrenaline to 18.3.4 fixed this.
2.With Pete_X's suggestions, I was able to get my Samsungs around 1000 h/s and my Hynixes around 900 h/s but when I put them together GGS would throttle and I would run out of memory. Any thoughts on this zawawa or anyone?
1. 18.4.1. is just one thing -> bugged ... better stay away from it
2. That is normally i sign for a: wrong intensity or b: a gpu crashed - or both. You should see on the graph or at the speed if it wortks - or not. Second Thread starts with a dely - so don't get fooled by some cards - it can take up to 2 Min or so till the 2nd thread is running at full speed ... Graphs tell also a lot ... flatline, up'n down etc ... Best to test it out is to enable just one card. Voltages in the safe zone and intensity conservative at a lower start. Card by card and notes taken should lead to success ....
Not to forget - the swap file - it can't be big enough. For my rigs i simply use a old HDD (1TB) and W10 got a 156GB swap file on that drive
PS: Got my hands on an old 570 Pulse 8GB with Hynix MJR - right now running 2-122-8 1200-950-2100-950 @1025h/s