Hi, I had the same hash problem and instability. I solved it by downloading the OC, core 1275 and memory 2100.
Also you can upload in the configuration
“gpu_threads_conf”: [
{“index”: 0, “intensity”: 1000, “worksize”: 8, “affine_to_cpu”: false, “strided_index”: 1, “mem_chunk”: 2, “comp_mode”: true},
{“index”: 0, “intensity”: 1004, “worksize”: 8, “affine_to_cpu”: false, “strided_index”: 1, “mem_chunk”: 2, “comp_mode”: true},
{“index”: 1, “intensity”: 1004, “worksize”: 8, “affine_to_cpu”: false, “strided_index”: 1, “mem_chunk”: 2, “comp_mode”: true},
{“index”: 1, “intensity”: 1008, “worksize”: 8, “affine_to_cpu”: false, “strided_index”: 1, “mem_chunk”: 2, “comp_mode”: true},