07-23-2024 12:37 AM - edited 10-02-2024 12:23 AM
September 25th Update:
Beta BIOS Links (microcode 0x12B)
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Z760
Intel has identified four (4) operating scenarios that can lead to Vmin shift in affected processors:
Regarding the 0x12B update, Intel is working with its partners to roll out the relevant BIOS update to the public.
Intel’s internal testing comparing 0x12B microcode to 0x125 microcode – on Intel® Core™ i9-14900K with DDR5 5200MT/s memory1 - indicates performance impact is within run-to-run variation (ie. Cinebench* R23, Speedometer*, WebXPRT4*, Crossmark*). For gaming workloads on Intel® Core™ i9-14900K with DDR5 5600MT/s memory2, performance is also within run-to-run variation (ie. Shadow of the Tomb Raider*, Cyberpunk* 2077, Hitman 3: Dartmoor*, Total War: Warhammer III – Mirrors of Madness*). However, system performance is dependent on configuration and several other factors.
Intel® reaffirms that both Intel® Core™ 13th and 14th Gen mobile processors and future client product families – including the codename Lunar Lake and Arrow Lake families - are unaffected by the Vmin Shift Instability issue. We appreciate our customers’ patience throughout the investigation, as well as our partners’ support in the analysis and relevant mitigations.
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August 2024
Hi all,
This update will be pinned here for clarity on the ongoing situation with some 13th and 14th-gen CPUs experiencing instability exhibited at stock.
Intel has issued the following statement (07/22/2024)
Based on extensive analysis of Intel Core 13th/14th Gen desktop processors returned to us due to instability issues, we have determined that elevated operating voltage is causing instability issues in some 13th/14th Gen desktop processors. Our analysis of returned processors confirms that the elevated operating voltage is stemming from a microcode algorithm resulting in incorrect voltage requests to the processor.
Intel is delivering a microcode patch which addresses the root cause of exposure to elevated voltages. We are continuing validation to ensure that scenarios of instability reported to Intel regarding its Core 13th/14th Gen desktop processors are addressed. Intel is currently targeting mid-August for patch release to partners following full validation.
Intel is committed to making this right with our customers, and we continue asking any customers currently experiencing instability issues on their Intel Core 13th/14th Gen desktop processors reach out to Intel Customer Support for further assistance.
For CPUs that exhibit unstable behaviour
Ensure you're on the latest BIOS for your motherboard
Update your motherboard BIOS to the latest revision containing microcode 0x125. Whilst this ucode revision does not resolve the issue, Intel has clarified that it contains fixes within microcode pertinent to Enhanced Thermal Velocity Boost (ETVB) behaviour that results in unexpected boost behaviour under certain thermal conditions.
Use Intel Base Profiles
The latest BIOS for your motherboard should contain Performance Preference options for Intel Base profiles. Ensure Intel Default Settings is selected. If using a 13th-Gen or 14th Gen i9 processor, choose Profile Performance.
If not selected already, ensure that SVID Behaviour is set to Intel Fail Safe
My CPU is running hotter using Intel Base Profiles than Asus Optimised, is this normal?
Yes, it can be normal for your CPU to run hotter than usual when using Intel base profiles. This occurs because following Intel's guidelines more closely often results in higher core voltages under certain workloads. Previously, motherboard vendors set the Load-Line Calibration (LLC) lower than Intel's recommendations to achieve lower temperatures while still delivering high performance. However, depending on your motherboard adhering to Intel's guidelines can lead to increased voltages whilst operating within Intel's current limits. This can result in higher operating temperatures depending on the workload.
Disable XMP
XMP is considered overclocking. To eliminate overclocking instability XMP should be disabled if experiencing crashing or unstable behaviour. Be sure to retest the behaviour at DRAM defaults.
Evaluate Cooling
Ensure your CPU cooling is working within the expected realms. If still experiencing instability under the conditions described above, consider reapplying the thermal application and removing any third-party CPU contact frames which may impact signal integrity.
Is my CPU damaged?
If still experiencing instability at Optimised Defaults [Intel - Performance / Extreme Profile] with XMP overclocking disabled, you will need to contact Intel.
I've read there was a fabrication issue with oxidisation, Intel has confirmed it.
This issue is unrelated to the ETVB behaviour and firmware and is a physical defect. Currently, Intel has gone on record to state that a number of 13th-generation CPUs from 2023 are potentially impacted by this issue
12-16-2024 01:30 PM
I am posting a 7-day review of Bios 1801. After a week of gaming and browsing I feel that the temperature has gone a bit down during game play and the fans go noticeably slower after exiting CS2. The overall experience is a good one temps are down and fans are spinning slower. I have not experienced any instability at all, and the pc is running cooler than before
01-02-2025 09:21 AM
Well I just built a Asus Z790-H Strix Gaming WIfi and I5-13400f computer for my best friends kid. The board and processor were purchased a while back as he got the different components over the last year or so for his birthday and christmas.
The i5-13400f used has the B0 stepping so its actually a raptor lake variety and not alder lake thus could be susceptible to this stability issue. The board had an older bios on it, one that defaulted the Asus Multi-Core Enhancement to "Auto- Lets Bios Optimize" instead of "disabled - enforce all limits".
That being said I never left the bios because this computer was brand new so no operating system was installed or any functions that would stress the cpu. Before doing anything else I updated the BIOS to the latest version from Asus's site and restored the factory defaults using "F5". This set the intel profile and then defaulted the MCE to "disabled - enforce all limits".
My question is was any damage done to the CPU potentially from the Intel stability issue by booting to the bios with the older bios version that came on the board, since it didn't have latest processor microcode update. I would hope that simply going into the bios, wouldn't push the processor too hard. Is there any chance of degradation occurring in this circumstance?
01-02-2025 09:26 AM
I am 99.9% sure zero damage was done, just for reference, i have the Asus Z790-H Strix Gaming WIfi also, but with the dreaded 13900K, i was using the board and cpu with the very old bios for months and months before updating, and that was gaming and stress testing alot, and i still have no problems.