for light video editing and gaming my budget is like $100That's actually a very weak APU. What's the purpose of this PC, gaming, or some other task ? What's your exact budget for the Video card ?
750ti? i guess a big bottleneck would occur on that, can rx 550 would not bottleneck?Well you're gonna need a card that wont bottleneck the cpu, I'd probably suggest a 750 Ti or something older.
how about hd 6450 or gt 710 or gt 710?I would almost bet even a GT 1030 would be bottlenecked.
720pGT 710 should be fine, but first of all, what's the native screen resolution of your current Monitor, 720p, or 1080p ?