I'm using R5 1600 with B350 PC MATE.
I didn't overclock my CPU yet. (stock speed.)
My CPU reaches up to 50-55 degrees in BIOS.
1600X has much higher clock speeds. So, it can get warmer compared to stock speed R5 1600.
If Windows temps are fine, then no problem i think.
30 degrees celcius is very normal for idle.