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Intel Fixes Instability Issue on 13th and 14th Gen Processors with New Firmware

Intel has confirmed that the cause of problems with instability of 13th and 14th generation processors is a bug in the eTVB (Enhanced Thermal Velocity Boost) microcode, as well as increased input voltages. The company has already started rolling out a BIOS update that fixes the eTVB firmware to address instability issues.

According to Intel, a bug in the eTVB microcode causes processor instability, but this is not the only reason. Higher input voltages resulting in higher turbo boost frequencies and voltages also contribute to problems. Intel and its partners, such as motherboard manufacturers, have already begun rolling out the new BIOS with the eTVB microcode fix.

As of now, manufacturers like MSI have already released BIOS updates for their Z790 boards. New BIOS versions use microcode B0671/125, which fixes the eTVB bug.

Among the updated models are:

  • MPG Z790 CARBON WIFI – 7D89v1C3
  • MPG Z790 CARBON WIFI II - 7D89vA43
  • MPG Z790 CARBON MAX WIFI - 7D89vA43
  • Z790MPOWER - 7E01vP33

Intel has also released a guide for configuring "Intel Default Settings" power profiles to ensure stability for all Core i9, i7 and i5 processors. This means that reduced power will be applied to ensure stability, which may result in reduced performance.

Intel Default Settings

The problem was identified through instability analysis, which indicated that the cause was an incorrect value in the eTVB microcode algorithm. Intel has confirmed that the new patch fixes the bug, but it does not solve all instability problems.

The company also encourages users to update their motherboard BIOS to the new firmware version by July 19, 2024. This update includes a fix for eTVB that should improve the processor experience.