Try this simple test:
Run YOUR games, but lower your resolution and eye candy.
This makes the graphics card loaf a bit.
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.
I am guessing cpu.
The 11700K is about twice as strong in single thread performance.
That is what games like CSGO need.
If looking for a graphics upgrade, check out your psu capability, 2070 needed about a 500w psu.
An upgrade may need more.
On the ssd upgrade, I have two thoughts:
1. Buy one single larger ssd vs. two smaller ones. Perhaps 2tb.
It will cost less and there is no performance impact.
One ssd leaves you with future attachment capabilities.
2. Do not get too impressed by glowing ssd benchmarks.
They are done with apps that push the SSD to it's maximum using queue lengths of 30 or so.
Most desktop users will do one or two things at a time, so they will see queue lengths of one or two.
What really counts is the response times, particularly for small random I/O. That is what the os does mostly.
These experts could not tell the difference:
View: https://www.youtube.com/watch?v=4DKLA7w9eeA