I wanted to try amd gpu's(dissapointed in this shtty gpu's)).
It's well known that Radeon GPUs, despite offering better pricing, compared to Nvidia GPUs, have plenty of other issues. Namely far higher power draw, are hotter running and Radeon drivers also have far more issues than Nvidia drivers. So, the money you saved initially when buying a GPU, will be gone by running the GPU + troubleshooting the issues it may have.
But anyway, thanks for the advice,even thought it hasn't helped at all
Well, what do you expect? That we can magically make all your issues go away? Despite you should be knowing better not to install two or more GPUs in the same system, from completely different manufacturers (Radeon and Nvidia). Throw in Intel ARC GPU as well, to complete the GPU zoo.
Long past are the days of SLI or Crossfire. Nowadays, multiple-GPU system is only for workstation use, that needs the GPU compute power for number crunching/rendering. And even then, issues can arise, where two or more identical GPUs doesn't want to work together. Mining rigs are another instance where multiple GPUs are used in the same system.
Now, if you would have two Crossfire compatible Radeon GPUs (e.g HD 7750), or two SLI compatible GTX GPUs (e.g GTX 1070), with the SLI/Crossifre bridge, then MAYBE it would be worth the effort to make two GPUs to play together. Still, even with Crossfire/SLI in a dual-GPU system, GPUs power draw and heat output is doubled, while performance gain is ~50% increased, if even that. And most games don't support Crossfire/SLI to begin with.
Of course, Crossfire/SLI has their own downsides as well. E.g you can't use Crossfire in borderless window. You have to use full screen. While with SLI, you have to use identical GPUs and on some instances, it can actually hurt the performance (getting lower FPS than using only one GPU).
AMD ended official support for Crossfire back in 2017. Nvidia has held on SLI for longer, phasing it out by 1st dropping 3-way SLI support with the launch of RTX 2000 series (keeping only 2-way SLI support) and dropping it all together with RTX 3000 series release. So, SLI is also dead.
Just because you want dual-GPU system, doesn't mean it's viable or even possible.
On an analogy; it's like mixing gasoline with diesel, where one wants the acceleration of gasoline but the torque of diesel. And when the engine doesn't work right, if at all, complaining starts.