If system freeze while or after applying OC that usually means there are aggressive values set and cards cant handle, try lowering the values and test.
I have also tried setting Overclock mode = NO, same screen fragmenting, freezing. It seemed to boot up fine when I set auto start miner =NO, however I couldn't figure out how to start mining from there. (Sorry I'm complete linux noob.) Is there a command to permit the miner to start after the 1bash has been set to not auto-start mining? I'm just at a point where I can't imagine what I could be doing wrong.
For the wallet/pool information section, the bottom line for pool protocol shows "stratum + tcp" Does this need to be changed to anything?
Or perhaps the algorithm intensity do I need to change that from 0?
Thanks again and let me know if you have a donation address.