If you didn't solve yet with the thread of Teamredminer, I suggest you to do the basics first:

1 - Put everything at stock settings, no overclock on GPU, this is the most commonm error

2 - Change the miner, test PhoenixMiner and Nbminer, these are two good miners

3 - Check every piece of cable and connectors, check riser cable too if you're using one

4 - And last, try another OS, like HiveOs or even windows

High chances that you'll solve your problem with these steps, most of times are bad overclock, changing the miner can help you too, there are some times that I solved issues only changing miners, riser cables are often defectives, or some cable can be detached, and last, changing the OS can solve issues with drivers and incompatibility.