Just an update about my rig and how I temporarily fixed my hang issue.
I have a rig with 6 rx470s and ever since version 12.0 i have had issues with one of my GPUs hanging. I would have to restart the entire system every time this happened which was quite often. The last stable version for me was version 11. So I compared the differences from the two versions and the only thing I noticed was the different mining algorithm. All 12 versions defaulted my 470s to the faster ASM algorithm which worked fine on all my GPUs except one. the one that kept hanging. so i changed the algorithm for the GPU that was hanging back to the original one and I haven't had any issues since on version 12.3. My config file looks like this.
ZecMiner64.exe -zpool ssl://eu1-zcash.flypool.org:3443 -zwal zcashaddress.YourWorkerName -zpsw x -asm 1,1,1,1,1,0
0=card 5 (the card that would always hang)
Hope this helps!
Good idea, thanks i also have a card that fucks up. I will try this now