Warning: Gigabyte X370 K7 BIOS update adjusts vCore to 1.55V

TechPowerUp warns users of the Gigabyte X370 K7 motherboard to skip the most recent F5 BIOS version as it contains a potentially dangerous bug. Users who installed this new BIOS version report Gigabyte's Dynamic vCore feature adjusts the Ryzen vCore to unnecessary and potentially dangerously high levels.

The site reports users that were seeing vCore values of around 1.2V are suddenly seeing a whopping 1.55V instead:

The problem appears to be related to the usage of Gigabyte's Dynamic vCore functionality, where users that were seeing vCore values of around 1.2v started seeing those dynamic values, as set by the motherboard, being set to a crispy 1.55v instead, at the same clocks as before the BIOS update. If you have such a motherboard, and have recently updated your BIOS to revision F5 or planned on doing so, please do yourself a favor and set vCore manually to your value of choice, compensating with LLC (Load Line Calibration) so that your CPU isn't shocked to death with additional vCore.

So if you're using this motherboard, check the vCore readout and adjust it manually or roll back to an earlier BIOS version if you're having trouble.