stellite v4 srb 1.6.9 --- 6 cards
[2018-11-24 11:02:01] GPU0: AMD Radeon (TM) R7 370 Series [pitcairn] [2048 MB][I: 28.0][W: 8][T: 2][F: 1][K: 1][BUS: 8]
[2018-11-24 11:02:01] GPU1: AMD Radeon (TM) R7 370 Series [pitcairn] [2048 MB][I: 28.0][W: 8][T: 2][F: 1][K: 1][BUS: 10]
[2018-11-24 11:02:01] GPU2: Radeon(TM) RX 460 Graphics [baffin] [2048 MB][I: 26.0][W: 8][T: 2][F: 1][K: 1][BUS: 4]
[2018-11-24 11:02:01] GPU3: AMD Radeon R7 200 Series [pitcairn] [2048 MB][I: 28.0][W: 8][T: 2][F: 1][K: 1][BUS: 11]
[2018-11-24 11:02:01] GPU4: Radeon(TM) RX 460 Graphics [baffin] [2048 MB][I: 14.0][W: 8][T: 2][F: 1][K: 1][BUS: 1]
[2018-11-24 11:02:01] GPU5: AMD Radeon R9 200 Series [tonga] [2048 MB][I: 28.0][W: 8][T: 2][F: 16][K: 1][BUS: 9]
тeпepь вepcия srb 1.7.1
[2018-11-24 11:07:56] GPU0: AMD Radeon (TM) R7 370 Series [pitcairn] [2048 MB][I: 28.0][W: 8][T: 2][F: 0][BUS: 8]
[2018-11-24 11:07:56] GPU1: AMD Radeon (TM) R7 370 Series [pitcairn] [2048 MB][I: 28.0][W: 8][T: 2][F: 0][BUS: 10]
[2018-11-24 11:07:56] GPU2: Radeon(TM) RX 460 Graphics [baffin] [2048 MB][I: 26.0][W: 8][T: 2][F: 1][BUS: 4]
[2018-11-24 11:07:56] GPU3: AMD Radeon R7 200 Series [pitcairn] [2048 MB][I: 28.0][W: 8][T: 2][F: 0][BUS: 11]
[2018-11-24 11:07:56] GPU4: Radeon(TM) RX 460 Graphics [baffin] [2048 MB][I: 14.0][W: 8][T: 2][F: 1][BUS: 1]
[2018-11-24 11:07:56] GPU5: AMD Radeon R9 200 Series [tonga] [2048 MB][I: 28.0][W: 8][T: 2][F: 16][BUS: 9]
I agree the settings for each version are different and can change the results but not so much, 2 times less
this rig is my solyanka assembled from different series of cards, old and new
Look at the fragments in 1.6.9 and 1.7.1.
Try using these in 1.7.1 :
GPU0 : F1
GPU1 : F1
GPU2 : F1
GPU3 : F1
GPU4 : F1
GPU5 : F16
Set in gpu_conf, you can see on the first page how.
Then come back here and tell me is it better.