Radeon r7 260x gaming

Solution
Maybe.

Frankly, if you are willing to live with the resulting frame rates, you can choose any settings you want. You are the one who will be playing the games, so it's up to you to decide on preferences. There is always a trade-off between quality and how many frames you will be able to output every second.

There is however no way any graphics card is going to be able to play games that are released 4 years from now, with any sort of guarantee on performance. It's just not possible to future proof or guarantee what will happen with things that aren't even currently available.

If you want a comparison, the R9 260x you are interested in has less power than the graphics devices in either the Xbox One or PS4, and my understanding is most...
No. If you need medium - high graphic settings, pick a lower resolution, otherwise you could do 1080p at lower details.

All that aside, it is going to depend very much on the game you're trying to play. Old games such as League of Legends are hardly demanding, and can be maxed out and also run at high frame rates on a card like this.
 
Maybe.

Frankly, if you are willing to live with the resulting frame rates, you can choose any settings you want. You are the one who will be playing the games, so it's up to you to decide on preferences. There is always a trade-off between quality and how many frames you will be able to output every second.

There is however no way any graphics card is going to be able to play games that are released 4 years from now, with any sort of guarantee on performance. It's just not possible to future proof or guarantee what will happen with things that aren't even currently available.

If you want a comparison, the R9 260x you are interested in has less power than the graphics devices in either the Xbox One or PS4, and my understanding is most software on those platforms is being held to a 30 FPS limit because the equipment can't reliably maintain 60 at reasonable detail levels.

Personally, I think you can likely tune most games to run well enough on the R9 260x to be enjoyable, but that will also depend on the rest of the computer not bottlenecking the card.
 
Solution
Maybe.

Games that are heavily CPU dependent, probably (for example Skyrim in some areas and the Battlefield series when played in multiplayer.)

Games that are heavily GPU dependent, probably not.

You can't eliminate bottlenecking. At some point, a piece of hardware in your computer will be the final factor in determining what your maximum frame rate for a given set of detail settings will be. You can at best try and match your hardware and settings, to try and put the bottleneck where you are willing to live with it.