Intel Still Working to Fix Raptor Lake Problems
The Raptor Lake hybrid architecture was first commercialized in October 2022, when Intel released the initial wave of its 13th Generation processors. It was then reused for Intel's iterative 14th Generation CPUs, which were launched 12 months later. In February 2024, reports started surfacing of select models from both generations experiencing consistent crashes in certain scenarios. Intel acknowledged these reports and launched a comprehensive investigation into the cause of the instability issues shortly afterward.
Intel now believes it has found the root cause of the Raptor Lake crashing issues, having said as much in a late September 2024 update. Specifically, the company's probe confirmed that a phenomenon known as "Vmin shift instability" was responsible for the crashes, wrote Intel Communications Manager Thomas Hannaford. For reference, "Vmin" stands for "minimum operating voltage." The problem is caused by subjecting a part of an affected CPU's internal clock system to a high voltage and temperature over time. This finding aligns with the fact that some users have previously managed to circumvent the instability issues by undervolting and/or underclocking their Raptor Lake desktop CPUs.
Intel's investigation has now identified four specific scenarios that can lead to Vmin-related instability of Raptor Lake CPUs. Two of these have already been addressed with the microcode 0x125 and 0x129 updates, which rolled out in June 2024 and August 2024, respectively. Another one is caused by motherboard power delivery settings exceeding Intel's power guidance, which can be resolved by simply resetting the affected processor to its default settings.
The final scenario stems from high core voltage requests made during light or idle activity. This particular issue will be addressed with yet another microcode update, identified by version number 0x12B. The critical BIOS patch will be released shortly, Intel said, noting that it is already in the process of working with its motherboard partners on its deployment. However, the semiconductor manufacturer has not committed to a more concrete time frame for the rollout.
Based on the company's recent testing, the 0x12B update will not have a significant performance impact on a variety of common applications, including gaming. The Raptor Lake mobile processors used in laptops and notebooks are not affected by any Vmin-related instability problems, the chipmaker confirmed. Future Intel CPUs won't be affected by the issue, either.
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Related Forum: Gaming Discussion
Source: https://gamerant.com/intel-raptor-lake-issues-fix-status-vmin-shift-instability-root-cause/
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