This is what I get when I run sgminer 5.3.8:

clDevicesNum returned error, no GPus usable
Command line options set a device that doesn't exist.

This is my batch file:
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_MAX_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_MAX_SINGLE_ALLOC_PERCENT 100

sgminer --kernel tribus -o stratum+tcp://yiimp.ccminer.org:8533 -u D9Msc3bEAPrj9Y5tuUYwkjwDo5Qmu1ArkQ.2 -p x
pause

I am using AMD RX 480 8GB cards and driver version 16.9.2 which I read is good for Claymore which I am using now for mining ETH.