Is it legal to mine with both amd and nvidia?
To be on topic, I am still mining zec with one gpu (7970), clay 8 works really well.
if not illegal at least immoral, or possibly unethical

as mixing
red and
green would be
brown and that is just ( well you know )
Okay now I know why my mining profits first went from green to red and later to brown. Damn, I have been in this game quite long and I didn't see this coming.
7970 still does over 200 s/s with claymore 8.0