In version 31f the overall performance on my rig with 12 552rx fell to 200+ hashes (from one card 347-> 330) The settings were exactly the same, the trick I used, maybe this version does not work now.) 
I return to the royal 31e version of the miner
Developer, what drivers do you use for testing? I'm using 18.3.4.
PS: Just in case, I bring the parameters of the video card on which the rig is assembled.
Rx550 2gb Baffin 1150/1800 (1071/1500) 768sp/12cu (unlock 640/10), mem Elpida
On the test card 588 on the new version, on the contrary, growth is seen on the Heavy Algo from 1100 to 1120 hashes!
Wow, great speed! What settings in miner and overclock settings for 580 card you're using?I return to the royal 31e version of the miner
Developer, what drivers do you use for testing? I'm using 18.3.4.
PS: Just in case, I bring the parameters of the video card on which the rig is assembled.
Rx550 2gb Baffin 1150/1800 (1071/1500) 768sp/12cu (unlock 640/10), mem Elpida
On the test card 588 on the new version, on the contrary, growth is seen on the Heavy Algo from 1100 to 1120 hashes!