as title suggests, wondering whether its worth it to go upto a 570gtx from my 470gtx, or should i go another 470gtx for sli 
but bearing in mind as well as performance increase to price ratio, power draw is also a main concern for electric bills.
im open to cunning suggestions.

but bearing in mind as well as performance increase to price ratio, power draw is also a main concern for electric bills.
im open to cunning suggestions.