If I'm not mistaken, you have an XtremeGear model XG-H800, which I think is manufactured by HAPPY MULTI-WEALTH TECHNOLOGIES, and it's not great when it comes to build quality and efficiency. Replace this PSU for some other high quality PSU.
Buy anyways, do NOT use that PSU for any future upgrades. Read this as well:
https://www.cyberpowerpc.com/forum/topic19111.html
Have you considered buying the RTX 2060 ? Or you can also buy the RX 5700 GPU, any of the custom AIB models (not the reference cooler cards).