No, 1.4v-1.5v is not typical for 2700X at stock.
No, 1.4v-1.5v is not typical for 2700X at stock.
You're seeing a stable performance with Precision Boost Overdrive active. The voltage range you described is normal and indicates good power delivery. In gaming, the cores typically run at higher frequencies, which naturally affects voltage. This isn't unusual and shouldn't impact your experience much. No major adjustments are needed unless you notice significant drops in frame rates or stability.
AMD CPUs often consume a lot of power when idle, which explains why 1.4+ is typical.