Premiere using only 15% of the renderer

[zezinmalado]

Good afternoon, I think my rendering performance is a little strange. 
I have a Ryzen 5 2600 processor and an RX 570 4GB video card. 
Regardless if I render the video using Premiere or Media Encoder, 
they end up using 100% of the GPU and only 15% of the processor. 
I'm a little worried because I bought a Ryzen 7 3700X to improve rendering and if it continues, 
the processor won't even be used in rendering as it should. The GPU acceleration option is checked, 
however, I tested it on 2 friends' computers (also with this option checked), 
and on one of them it used 100% of the GPU and processor, 
on the other computer it used 100% of the processor and 0 % of GPU. 
I'm confused, can someone help me?

[Andy 1968]

It depends on the GPU and CPU and how you setup Premiere Pro. The video might be worth watching. I opt to use Intel's Quick Sync.

https://www.youtube.com/watch?v=1L-erwmRxAU&feature=emb_imp_woyt