What is your budget?
I do not much like the term "bottleneck" as is commonly used.
There is no such thing as "bottlenecking"
If, by that, you mean that upgrading a cpu or graphics card can
somehow lower your performance or FPS.
A better term might be limiting factor.
That is where adding more cpu or gpu becomes increasingly
less effective.
My stock approach to this perennial question of cpu vs. gpu for an upgrade.
Some games are graphics limited like fast action shooters.
Others are cpu core speed limited like strategy, sims, and mmo.
Multiplayer tends to like many threads.
You need to find out which.
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To help clarify your CPU/GPU options, run these two tests:
a) Run YOUR games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.
b) Limit your cpu, either by reducing the OC, or, in windows power management, limit the maximum cpu% to something like 70%.
Go to control panel/power options/change plan settings/change advanced power settings/processor power management/maximum processor state/
This will simulate what a lack of cpu power will do.
Conversely what a 30% improvement in core speed might do.
You should also experiment with removing one or more cores/threads. You can do this in the windows msconfig boot advanced options option.
You will need to reboot for the change to take effect. Set the number of threads to less than you have.
This will tell you how sensitive your games are to the benefits of many threads.
If you see little difference, your game does not need all the threads you have.
It is possible that both tests are positive, indicating that you have a well balanced system,
and both cpu and gpu need to be upgraded to get better gaming FPS.
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If you have the itch to buy something, then there are some other possibilities.
Do you love your case? could a new case be a good thing for you?
What is your monitor?
Perhaps a larger monitor would be more immersive.
Adding a second monitor is great for normal desktop work.
If you want a better processor, you have some options.
Many games are limited by the single thread speed of the master thread.
The 1700X stock clock is 3.4 with a turbo of 3.8 that will apply to only one thread.
The x suffix chips are better binned so you may be able to overclock some.
You could upgrade to a 3600x with a 3.8/4.4 clock
Overclocking ryzen does not seem to be particularly effective.
As a different option, look into an entirely different intel platform like a i7-9700K which can do 5.0 on all 8 threads.