RTX 3070 running very below avarage performance

[joaogaviolir]

I ran some benchmarks (UserBenchmark and PassMark) and they both tell me that my pc is running below its capacity, compared to other similar PCs. 
More specifically, the problem seems to be with the graphics card. 

I have a Ryzen 5 5500 with a RTX 3070 (I know there is bottleneck in this configuration), but when I watch videos on YouTube of games running in this configuration, they all run much higher than I can get. 

Also, I recently installed the new Horizon Forbidden West, and I got an average of 40 FPS running everything on very low at 1080p.

Something is wrong, but I don't know what else I can check. Any tips, suspicions?

I bought this card at the beginning of last year, but it was used. It is a version of Gainward (Phoenix) that has LHR. Could it be that if it was used for mining, the graphics chip may be "tired" causing low performance? 
Is there anything I can validate on my own?

Well, I did everything I could do with basic recommendations I received on Reddit.

GPU Driver: most up-to-date possible (551.86).
BIOS: most up-to-date possible F19 (AORUS B550M v1.3).
All drivers updated.
RAM XMP active.
All AMD video drivers deleted (deleted with DDU).
Resizable Bar enabled.

I didn't notice any FPS improvement.

As I said initially, I have no errors or problems, only extremely low performance for the GPU, given the comparisons with the same GPU + CPU combo that I researched online.

Would anyone have any more tips or have gone through something similar that they managed to solve?

To consolidate, below are all the links to prints and benchmarks that I have done so far:

Passmark: https://www.passmark.com/baselines/V11/display.php?id=206562112913

 

GPU-Z: https://gpuz.techpowerup.com/24/03/30/hru.png
 

https://imagizer.imageshack.com/img922/636/vkhjNm.png(Horizon FW in game prtscrn)

https://imagizer.imageshack.com/img924/3243/RMF53e.png(3D Mark Demo - Print 1)

https://imagizer.imageshack.com/img923/6237/WNtBQd.png(3D Mark Demo - Print 2)

https://imagizer.imageshack.com/img923/7117/OxvFPP.png(3D Mark Demo - Print 3)

https://imagizer.imageshack.com/img924/9027/GiM0d4.png(CPUZ)

https://imagizer.imageshack.com/img923/3707/O63x0Y.png(CPUZ)

https://imagizer.imageshack.com/img922/3862/wkGdzi.png(CPUZ)

https://imagizer.imageshack.com/img923/1589/ydOwRg.png(CPUZ)

https://imagizer.imageshack.com/img924/8166/28I7qR.png(CPUZ)

 

GPU installation: 

 

Full picture of Mobo (AORUS B550M v1.3): https://static.gigabyte.com/StaticFile/Image/Global/883819369cb3d1be25acc0ba9d5e72ab/Product/32692 

[Godlygamer23]

Have you been monitoring temperatures at all? Clock speeds?