Question Bottlenecking? Or not

Apr 1, 2019
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Hey guys
Had this question in mind.
I currently have an fx 8350 with an asus strix GTX 960 with a 650W Psu.
I'm planning to upgrade my gpu to an Rx 590 but I'm hearing this might cause reduced performance of the 590.

Internet says cpu might bottleneck gpu.
Internet also says bottlenecking is a myth.

Really confused.
Any help would do guys :D
Thanks in advance

PS: Planning to run modern titles at 60fps at 1080p.