Normal
When you OC the IGP on Ryzen keep in mind that it's using power from the SOC rail which is also used to stabilize the memory controller. "GFX core voltage" is the same as SOC voltage. Since Ryzen IGP performance is bottlenecked by memory bandwidth, its a good idea to use the SOC voltage to help max out the memory to its limit. The performance gains from OCing the IGP itself aren't very good.