I have 5x RX480 (Saphhire Nitro +) with Blockchain drivers and custom BIOS. I'm limited to 1000W power.  I'm currently mining ETH + LBRY but I have some wierd errors. GPU stops every few minutes and then starts again... I tryed lowering dcri but no help.
Now my settings are:

Clock: 1050
Voltage: 950
Memory: 2080
voltage: 950

Can you tell me what settings on GPU do you use for this combination?