What are the risks of undervolting?
I don't know the physics of it, so please excuse my ignorance

1. If I undervolt but do not underclock, what will happen? Will HW errors simply increase, or do I risk the antminer getting damaged?
2. If I both undervolt and underclock, but it turns out I undervolted too much, the same logic applies as in #1?
3. I do not have a volt meter (and I dont know how to use one). Can I simply try with a little bit? The risk is applying too much graphite, not too little, right?