[990XA-GD55] How do you steady CPU Voltage?

In BIOS I set the CPU Voltage at 1.43V. But when I run Prime95 I can see in HWMon that the Vcore can go up to a max of 1.6V and most of the time it is around 1.55V and above. On seeing this I stopped P95. Here's an example. CPU Voltage was set at 1.43V in BIOS.
A MSI user on another forum also reported a similar situation with his system.
Is there a way to steady the CPU Voltage?
Thank you.

Not really. Voltage is going to vary & spike in relation with the load applied. That is why in many cases it is best to lower the clock some to keep the voltages within safe limits for long term use.

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