upgrade advice - current system specs listed

Your budget will buy a 2 x 4gb DDR4 kit of ram, est. $55
For Intel, I5-7600K est. $240
Z270 motherboard est. $140.
You will need a cooler, if the one you have is not ok, then budget $35 for something like a scythe kotetsu or cryorig H7.
I5-7600K is the strongest gamer around when overclocked.
Most will do 4.8.
That is particularly important for eve which seems to be single threaded.

On the ryzen side, it can be considered if you do lots of multithreading and can use the many threads.
Motherboard B250 est.$120.
1600X $250.

Neither of the two motherboards will include cf/sli capability.
You will pay more for that.

A good single card gpu upgrade might serve you better anyway.

consider a different approach, planning on upgrades in the future.
A G4620 is only $95 or so.
Buy a Z270 motherboard and see how you do.

Use the difference plus the sale of two RX460 cards to buy a strong single gamer like a GTX1060.

Here is my stock approach to the cpu vs. gpu question:

Some games are graphics limited like fast action shooters.
Others are cpu core speed limited like strategy, sims, and mmo.
Multiplayer with many participants tend 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. 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 processors 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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Mixed considerations.

MMO games usually depend most on the performance of the single master thread.
Intel is good for that.

Multitasking, first of all requires that you be able to keep most of what you are using in ram.
I suspect that 8gb will be insufficient.
Plan on at least a 2 x 8gb kit.

If your other than gaming tasks are very cpu intensive, then the 1500x with 8 threads might be good.

1500X has a nice total passmark number of 10936; that is the rating when you can fully occupy all 8 threads. The single thread rating is 1893.
The i5-7600K has a rating of 9295 with 4 threads, and a single thread rating of 2405.

Each can be overclocked; the 1500x perhaps by 10%, the 7600k likely by 30%.
Either would be a massive improvement over your X4-965 with a rating of 4219 and 1185.