Does Throttlestop Void Warranty?

We recommend customers not to use these softwares [ThrottleStop and Intel XTU]. It could damage the hardware or make the computer behave erratically or cause a brownout. Any damages as a result of this would not be covered under warranty.

Does Undervolting void warranty?

No, undervolting the CPU will not void the warranty and is perfectly safe to do. Here is some tips: Undervolt slowly, to see how low your machine is capable of going before the system become unstable, and crashes.

Does Undervolting void warranty AMD?

The Curve Optimization tool will be part of AMD's Precision Boost Overdrive toolkit, meaning that using it will invalidate the warranty on the hardware, however AMD knows that a number of its user base loves to overclock or undervolt to get the best out of the hardware.