The whole "An i5 is enough for gaming" ship has sailed. At this stage you'd be better going for Ryzen 3600 in all but a few niche use cases.
But ryzen better value with b450! Just avoid Reddit stories , lots of people seem to have issues with b450 and MSI and other vendors
Is 3200mhz the sweet spot for RAM on the Ryzen chips? Any noticeable different with going with the slower 3000mhz? Bare in mind i only use it for gaming and the odd photoshop/lightroom editing.
It's all about those aesthetics haha, i like my shiny glowy parts!You will not notice (1fps difference? in games at best)
Edit : you bought shiny nice RAM anyway. Health to enjoy.