Root cause of Vmin offset instability
Intel® has localized the Vmin shift instability issue to the clock tree circuitry within the IA core, which is particularly susceptible to reliability degradation at elevated voltages and temperatures. Intel has observed that these conditions may cause the clock’s duty cycle to change and observe system instability.
Intel® has identified four (4) operating scenarios that may result in Vmin changes in affected processors:
1) The motherboard power supply settings exceed Intel’s power supply guidelines.
one. Mitigation: Intel® default settings recommendations for Intel® Core™ 13th and 14th Generation desktop processors.
2) The eTVB microcode algorithm enables Intel® Core™ 13th and 14th generation i9 desktop processors to operate at higher performance even at high temperatures.
one. Mitigation: Microcode 0x125 (June 2024) addresses eTVB algorithm issues.
3) The frequency and duration of high voltage required by the microcode SVID algorithm may cause Vmin to shift.
one. Mitigation: Microcode 0x129 (August 2024) addresses the high voltage requested by the processor.
4) Microcode and BIOS code require an increase in core voltage, which may cause Vmin to change, especially during idle and/or light activity.
one. Mitigation: Intel® is releasing microcode 0x12B, which contains the 0x125 and 0x129 microcode updates and addresses the processor’s request for a voltage increase during periods of idle and/or light activity.
