Superclocked or factory OC models, regardless of manufacturer, will only increase performance 2-5% over reference cards. Clock speeds simply cant compete with a better architecture.
You decide. :http://www.techpowerup.com/reviews/ASUS/GTX_970_STRIX_OC/25.html
The 970 is over 25% faster than the 770. However dont get and EVGA model, their coolers are misaligned causing 2/3 heatpipe contact with the GPU die.
Superclocked or factory OC models, regardless of manufacturer, will only increase performance 2-5% over reference cards. Clock speeds simply cant compete with a better architecture.
The best one is Gigabyte G! (Well that's my opinion). It runs a little bit faster than every other out of the box, the 3 fans do their job properly, the blue led light on the top is really cool looking and best of all, it comes with 3 hdmi ports so you can plug up to a 3 monitor setup in the same card with the same kind of cables with no problem.
The problem my friend is that there are no 970's out there. Every single one is out of stock (with the exception of the EVGA one but people are having issues with it so I wouldn't recommend) So if you decided to return, you'll have to wait an average period of a month to get your card home. If you can handle that wait time it's totally worth it.