But my rx 570 is plugged in and im "taking" picture from its hdma port.
I think there is an issue with my gpu but is it possible for a "dead" gpu to "give" image?
If not, disassemble the video card, replace the thermal paste, clean it from dust and look for damaged elements.
If you've never done this, check out the guide on YouTube.
Be sure to clean the PCI pins of the video card and the PCIe slot on the motherboard.
Install Windows 10, configure the drivers and start testing.