[HELP] Building budget PC to run BeamNG

I am currently building a budget gaming PC. I have minimal experience doing this but understand it somewhat. If you have suggestions, part recommendations, advise; please don't be afraid to comment. Here's what we are working with:

- Some random prebuilt LGA 1155 motherboard with full ATX and 2 Ram slots
- FSP Group??? 300W non-linear PSU
- Kingston 250G SSD
- 8GB of RAM
- Intel Pentium G630

I understand these are not optimal specs for BeamNG so I order a Intel i5 3550 and a EVGA double MOLEX to PCI-e 6 pin adapter. From my experience these adapters seem to work from my research some of these adapters are junk and fry your stuff and some just get warm that's why I tried to get a on-brand one. I also plan one getting 1 8GB stick of RAM to up the RAM to 12GB. However I have not ordered a GPU I have a RX580 2GB I acquired a long time ago but I probably does not work. My budget for a gpu is >$85, GPU's are cheap on eBay I just don't know which one to get. Any help is appreciated! Have a nice day

 

By a PC

 

If you have nothing to positively contribute please don't post, I very specially spelled out budget at least a couple of times!
Have a nice day sir

 

pre-2022 forum users try not to be condescending challenge (impossible)

 

I apologize if I came off condescending, I'm not trying to start wars I just want some help.

 

whats the maximum your spending?

 

I plan on spending around $100 extra... I've already spent around $150

All I basically have left is a GPU but I want something that is equivalent to my i5-3550 I ordered I don't want to bottleneck it too bad.

 

the pc i have is $500 with amd ryzen 5000 and amd radeon graphics {laptop} and some times its hard to play but its fun!

 

look on facebook market you could find some sick deals

 

accepted

 

Thanks I looked and I found a 1080 ti for 50 bucks! but the guy sold before I could buy it. I'll definitely keep my eye out on there.