I set the CPU voltage to 1.3625 in BIOS, but when idle the sensor shows 1.38V, when I full load one core, it goes down to 1.34, and when I full load both cores, it goes down to 1.30

At about 80% load on both core the voltage is about 1.36, which makes it actually HOTTER than at 100% load both core

Is it normal?