So, i wanted to ask if i would connect working gpu which doesnt work lol(no screen when connected), but sli to working gpu, would it double hashing power? Like usuale used gpu (i know u shouldnt buy used but im 17 without income so this is how m i starting now) like i bought r9 270 2gb really cheap for around 50$, and found the same working, bios sees it for 10$ just it doesnt give screen. Sorry i dont know the word for it... just when connected u xant see screen lol
sli or crossfire don't give any boost in mining, it's just for gaming, but maybe there are some hidden algo that can do little gain with sli or crossfire, you need to dig around for this, usually it's not recommended as it is useless