This microcode fix can't be rolled out in a regular software update.
Andrew Cunningham - 8/9/2024
Intel has shared more about the voltage-related issues that affected some 13th- and 14th-generation Core processors, as the company tries to put the episode behind it. As reported by Tom's Hardware, Intel says that the problem originated with "elevated operating voltage" stemming from "incorrect voltage requests," specifically an increase to the minimum operating voltage of the chips. These "elevated voltage events can accumulate over time," eventually damaging the processor and causing system hangs or crashes.
Intel has developed a microcode update to fix those elevated voltage requests, but the bad news for some users is that they will require a BIOS update, and they can't be deployed via software updates as some microcode fixes can be.
Intel says that in most cases, CPU performance should be essentially unaffected by the patch, though the company did notice a handful of benchmark subscores and individual games that exhibited "moderate" slowdown (though we don't know how much that is, in concrete terms). Here's the relevant statement about performance: