I built my first Cryptonight rig a few months back using Sapphire Pulse RX 570 and was able to get 915 h/s @ 95 watt on the wall. Due to high prices and unavailability of RX 570s, I decided to give RX 560s a shot. I am glad to mention that I am able to obtain 515 h/s @ 40 watt on the wall for AMD RX 560 while mining Electroneum/Sumokoin (will be true for all Cryptonight coins e.g., Monero, Karbo). You can see the proof of hashrate and clock settings at this link: https://imgur.com/a/q1iKk

I am using sgminer-gm 5.5 with rawintensity 416 and worksize 8. The trick was to use 2 gpu threads in the config file as follows:

"rawintensity": "416", "worksize": "8", "gpu-threads": "2"

My GPU is Asus OC 2gb Polaris 14nm 1210 Ghz core and 1750 Mhz memory clock. It uses Elpida DDR5 memory. Its bios is modified using Polaris 1.6.6 editor's one click patch option and that was pretty much it. (I tried Sapphire RX Pulse 4gb version but could not get it above 410 h/s).

I tried Crimson Beta 17.30 Blockchain driver but it kept on crashing. Finally managed to make Crimson relive 17.7 work.

If you find the above post useful, please consider donating to following addresses:

BTC: 3CW1WbDDtjfWprc7K4VQpNtJP7jsJMTbGF

ETH: 0x134e57a0902eAb8019aE0dd7bC80cFd75B4b55f0

Sumokoin: Sumoo3NqEtVixhMfApYUzDa6AmomPypQ5AkHeMgfqTzG7G3nyQw5kbPSw9m69fKFJADMaVbnAkhpv86 kdK2haPRdgV5k1A3LJYi

Electroneum: etnk4mvPSG49h6Hw4xgaQrTbjQyJ4fnUh6F6jFVM6xpAfrJtswC6AaiJepPCWF1PSNj4xiMXc8QXU7G cfFZvpUi422Z9F82eth

Digibyte: DBtUYVhUrAXuDjjmAzNNWpcMWe6tJvWoEP

I performed transaction on 23-11-2017 on Cryptonator, buying BCN (Bytecoin) for 0.17 ETH approx. I received only 8059 Bytecoins, which means an exchange rate of BCN/ETH 46K. Whereas, the exchange rate on that day was 236K . They stole approximately US $65 from me.

Best part, they did not even generate a transaction receipt/number for this exchange.  And they are not even responding back to my emails. Snapshot of my account history is at this link:

https://imgur.com/a/mgclW

I performed transaction on 23-11-2017 on Cryptonator, buying BCN (Bytecoin) for 0.17 ETH approx. I received only 8059 Bytecoins, which means an exchange rate of BCN/ETH 46K. Whereas, the exchange rate on that day was 236K . They stole approximately US $65 from me.

Best part, they did not even generate a transaction receipt/number for this exchange.  And they are not even responding back to my emails. Snapshot of my account history is at this link:

https://imgur.com/a/mgclW