This is my first budget build, and it's kind of unique so this is what I am looking to do. I am building a pc for playing with emulators. I found this HP for only $100 and this is my starting point. It comes with a core i5 4670, 3.4Ghz processor and 16GB of DDR3 RAM. I will be adding an SSD with a good read speed as well. So now I'm wondering how to finish the build. It comes with 400W power supply with a 6 pin connector. I'm looking at either keeping the PSU and looking for a RX 570/RX 580 or a GTX 1650, 1060 6GB, or 1660. I am willing to upgrade the PSU so I can have an 8 pin connector as long as I don't have to drill holes into the case to install it. What I am going for here is the best bang for your buck set up. I want my bottleneck to be the CPU. I have read that the 1650 may be a good match to that CPU, but if I should go higher then I will. What do you guys think I should do? If there is a possible set up outside of what I mentioned before to reach that goal I am willing to do that as well. Thanks for the help in advance.