How can I get the most of 5800x and 6750xt?

How can I get most of 5800x and 6750XT?

As the title says – how can I get the most of 5800xt and 6750XT?

1. I tried OC-ing with this ZEN 3 PBO and Curve Optimizer Tweaking/Overclocking Guide. Got to 4.4GHz at negative 12 (as i remember). This is my overall: CPU-Z view.
2. I don't have a clue how to OC RAM nor change the timings – it's black magic to me. Even with this somehow famous Github tutorial: github RAM OC
3. From this: 6750XT OC&UV I've done the GPU.

My full specs are:

1. AMD R7 5800X @ 4.4GHz
2. XFX AMD RX6750XT 12GB
3. Liquid cooler – SilentiumPC Navis F240
4. 4x8GB Patriot Viper Steel 3600MHz CL18
5. PSU – Corsair RM650 80 Plus Gold
6. MOBO – Gigabyte B550 Aorus Elite V2.

GPU is like that as for now. Sits stable, temps are 60-63 degrees after AMD Adrenalin stress test.