What gpu FX 8320 wouldnt bottleneck?

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Crysis should be fine with almost anything. Witcher 3, I think it'll be fine with most cards.

General area that you could go for without a bottleneck would probably be the r9 290, maybe the r9 290x or the gtx 980 with that overclock.
If you're overclocking, you could probably go up to a GTX 980 or r9 290x before getting some bottlenecks.

If you're not overclocking, you'll probably be limited around a r9 290 or the gtx 970 at best, and i think that'll have a little margin of bottlenecks.

Most of these bottlenecks are game dependent anyways.
 
Crysis should be fine with almost anything. Witcher 3, I think it'll be fine with most cards.

General area that you could go for without a bottleneck would probably be the r9 290, maybe the r9 290x or the gtx 980 with that overclock.
 
Solution