ruffel

That's what I was guessing as well. I checked and Windows definitely think I still have B350, so I will work on uninstalling them.

1. Likely not, overclocking GPU is easy and safe(r) since if it doesn't work, the game just crash and you try again. If you can turn it back on and use it, it's fine since any damage possible from 1000mhz overclock would've killed the whole thing.
 
2. It's normal. OC scanning is basically checking how far your card can go, so when the card reach its limit, it glitches. Like I said in 1, that's how GPU overclock goes.
 
3. Not entirely sure about this, but check your graphics settings in-game, the CPU and RAM in the benchmarks you see. Background processes on your computer may affect your performance, but I doubt it'll be this much. Check afterburner to see GPU and CPU utilization. If your GPU utilization is low (not sure what is low, maybe see if the benchmarks shows it), then your CPU is the limit.
 
I'm not the most knowledgeable person on these subjects, but there's no need to worry. If these things breaks so easily, they probably wouldn't have be sold in the first place.

I think he is referring to the video of this (which isn't out yet)