Increase FPS by CPU, GPU, or RAM?

[michaelr8709]

I mainly play Overwatch at low settings and I get more than 160 fps. However, in the heat of combat, my fps can drop to 120. I am planning on getting a 144hz monitor so I need to maintain a consistent 144 fps.

These are my specs:
CPU: AMD Ryzen 5 1400
GPU: Radeon 570 - 4gb
RAM: 8 gb 2400Mhz

Should I upgrade my CPU, GPU, or RAM speed in order to get to that sweet spot of 144 fps? If so, what should the model be for either the GPU, CPU, or RAM to be compatible with my setup.

 

[clutchc]

Your gfx card is your weakest link right now. The aging GTX 570 is only the equivalent of the R7-265, a rather weak card itself. I'd consider the GTX 1060 6GB as a good upgrade candidate. Or an RX-580 8GB if you like the red team.
http://gpu.userbenchmark.com/Compare/Nvidia-GTX-570-vs-Nvidia-GTX-1060-6GB/3156vs3639