After taking out all the factors like price, life span, and so on. What is bar none the best graphics cards your able to get that will give you the best performance?
Well statistically the titan x is the bets single gpu card you can buy period but the 980ti performs almost identical for 250$ cheaper so id always recommend that
The 980ti is ridiculous right now. Never know what AMD has up their sleeve (we'll find out June 16th), but they are going to have to pull one huge rabbit out of their hat to top that card.