I wouldn't recommend the GT1030. The 10 series cards can have problems running on older mobo's without a UEFI bios. It's not a good idea for that card with your system. If you want nvidia, try a second hand gtx560ti/750ti or something.
Not sure if the R7's/R5's have the same issue with older bios.
But whatever you get, the CPU is not gonna help you at all. It's pretty underpowerd even for the aforementioned cards