are thay a good match? or will i see a bottleneck of some kind? im going to use DDR4 2400 RAM with the i3 if it changes anything
Perfect match! The i3 is actually a very good cpu for gaming. Performs very close to the i5... Check out this benchmark video
Ram speed rarely makes a difference, APU's benefit more from that. As for bottlenecks, yes, in some games you will bottleneck that gpu. Games that require multiple cores and/or are cpu heavy are the ones that will hurt the most.
Should be fine, as long as your not rendering or doing CPU intensive tasks at the same time as just for gaming then no bottlenecks.
That's a fine combo for a mid tier gaming system