Seems to be typical for Asrock m/boards. I have a E3C226D2I which shows core as 1.75V on a E3-1220V3 in the BIOS and via IPMI sensors with the latest BMC installed. This is confirmed by a E3C224D2I user @m0nkey_ . It seems to be a firmware bug, but I've not confirmed this with Asrock.
Found several other users with the same board having high vcore numbers. Seems like it is a bug reporting input voltage to the VRM instead of actual voltage to the CPU.