Try to install MSI Afterburner, from there you will be able to modify the OC... Also the put a screenshot of the error when you try to mine to see if we found the problem
Ok so i took 5 screenshots with gpuZ opened to see what happens when i try to mine grin32.
1.
https://i.imgur.com/FNylIWV.jpg --> Start miner (as usually it sees 1 vga as 2 and 1 of two *buffers ? not working ).
2.
https://i.imgur.com/7sqlRro.jpg --> Crashing gpu and call external script.
3.
https://i.imgur.com/67nRXgr.jpg --> Miner reports 80W but vga actually use 40W.
4.
https://i.imgur.com/8VuYj5k.jpg --> First *buffer ? start working again, Efficiency per gpu thread climbs to 23,000, gpu clock decrease, memory clock decrease, gpu load is now 3% and gpu power draw 5W, memory load stays in the same levels.
5.
https://i.imgur.com/qdTwvQ0.jpg --> Card readings show that vga is not doing any task, but memory is at full load and efficiency g/s/kw growing with hashrate.
