Electromigration is an issue that affects all electronics - the act of electrons bumping into silicon or copper atoms and moving them out of the crystal lattice raises the resistance of the wire, causing more voltage to be needed which exacerbates the issue. With modern processors, built on the nanometer scale, it becomes ever more important to keep the rate of electromigration low, as wires are only dozens of atoms wide. Things that affect the rate of electromigration include voltage, current, and temperature.
So when it was recently been discovered that motherboard manufactuers on AMD's AM4 platform are adjusting the default current values as detected by Ryzen's power delivery co-processors, increasing the thermals and ultimately providing more power being delivered to the CPU, what does this mean?. What does this mean for performance? What does this mean for the longevity of the processor? Does this affect electromigration to the extent that I should be worried? Here's our take on the matter.
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