Zombi310101

So I was gonna build a $600 PC to have for my little brother how ever I don't have the money too instead I have a Dell optiplex 9020-sff. It has a Intel core i5-4570 I believe it's like 3.0 or 3.2ghz and 16gb of Ddr4 ram I'm not sure of the speed and some basic storage running windows 10 of course however my question is what would be my best option for a low profile gpu. At first I was thinking we'll just a 1050ti it's not very expensive however I still don't know too much about all the different graphics card to use so my main question is what would be a good low profile gpu to put in this system? If I had a price I'd say $200 or less

Thank you

I have a Intel Core i5-6500 and want to build a small form factor PC. The problem I'm not so sure is actually a problem is that the motherboard might not be compatible the motherboard I hope to use is a Asus prime H310M-E R2.0 not exactly if it will work tho. This pc altho will not be my main PC this one is simply for just call of duty and a few other games more ment for my little brother so I'm not too worried about not having full 1080p 60fps gaming I'm just want to built one so he can stay off mine. The other specs if this pc will be a GTX 1650 16gb of hyper x fury 2666 mhz And simple 1tb hard drive and thermaltake 500 watt PSU