New Z790-Extreme BIOS 2402

[vincio]

Hi,
I updated the bios to the latest version 2402, which contains the fix for microcode to 0x125 eTVB, too bad that my previous settings I had with bios 1801 now no longer work.

I had these settings before, but after the update the machine is unstable:

Ai Overclock Tuner: XMP Tweaked
ASUS MultiCore Enhancement: Enabled - Remove All limits
SVID Behavior: Best-Case Scenario
Performance Core Ratio: AI Optimized
Optmized AVX Frequency: Normal Use
Efficent Core Ratio: AI Optimiezed

Digi+ VRM
-> CPU Load-line Calibration: Level 5

Thermal Velocity Boost:
-> Overclocking TVB Global Temperature Offset Value: +10

AI Features:
-> Cooler Efficiency Customize: User Specify
-> Cooler Score: 177

BCLK Aware Adaptive Volgate: Auto
Actual VRM Core VOltage: Auto
Global Core SVID Voltage: Auto

High Dram Voltage Mode: Enabled

To get everything working, I had to reset the bios to load default and then set these settings:

Performance Preferences [ASUS Advanced OC Profile]
Ai Overclock Tuner [XMP Tweaked]
ASUS MultiCore Enhancement [Auto – Lets BIOS Optimize]
Performance Core Ratio [AI Optimized]
Efficient Core Ratio [AI Optimized]
Global Core SVID Voltage [Adaptive Mode]
- Offset Mode Sign [-]
- Additional Turbo Mode CPU Core Voltage [Auto]
- Offset Voltage [0.07500]

AI Features:
-> Cooler Efficiency Customize: User Specify
-> Cooler Score: 177

High Dram Voltage Mode: Enabled

I hope it can help someone! 😉

[Milkovic]

I used your setting for the 1801 on my 14900ks with great results with bios 2402 with no issues...  

[Milkovic]

I've just noticed that my set up has a slightly higher wattage then the standard 253W:

PL1 300

PL2 300

With 400A limit

You may want to try that.

[vincio]

I set for safety:

PL1 300 Watt

PL2 300Watt

ICC 350A

So at least there is a maximum limit set for both watts and amperes.

instead, as suggested by silent, I reduced the Global SVID to - 0.095

I repeat the test! 

[vincio]

These days I made a small change riseptto what I suggested, bringing the Global Core SVID Voltage from -0.075 to -0.100.

I then used Process Lasso on Windows, turning on ProBalance and Performance Mode, while Ide Saver turned off.

In this way I further reduced the overall CPU voltage and better managed the processes on OS. On CineBench my score increased and the machine is stable.

@Milkovic what you suggest I didn't touch it as default, so it's staying in auto

[masoud_s_geo]

after update i noticed the  freq is downgraded to 4.4ghz is it the same for you even change power limit back to 300W and no difrance, just in reset default (witch was running in default after delegate 13900k) smtwas changed from auto to an number didnt care at that moment, what freq you get are you get in 14900k now?

[Milkovic]

On my 14900ks is still 6.3/6.1

[Silent_Scone]

Hi @vincio 

I noticed SVID Behaviour setting is absent in your amended fixes. Perhaps setting the Best Case Scenario was too optimistic for your sample. Most CPUs won't be comfortable running with LL value this low.

[vincio]

What I realized after many, many months of testing that the problem lies on these three paramenters:

Actual VRM Core Voltage
Global Core Svid Voltage
Cache Svid Voltage

To simplify and pose examples:

The first VRM is generally used alone, without changing the other two parameters, and once set, you give a single voltage to the entire CPU, in essence it would be like running the system at a single fixed frequency.

The second Global Core Svid Voltage, adjusts L1 and L2 voltages, the CPU works at various frequencies based on Idle or Full loads.

The third Cache Svid Voltage on the other hand is the latest innovation introduced by Intel with the 13th and 14th generation of CPUs, this groups L1 and L3 into a kind of single, large cache called L3, from my research I realized that this is the main cause of the well-known overheating and blue screen (BSOD) problems. If you touch this parameter the risk is to accumulate data too fast for temporary memory, once you transfer this data too fast to the CPU for final calculations, this can lead to bottlenecks and then you create data synchronization problems with the problems mentioned before, that's why some people on the web or forums complain about ram, hdd and other hardware problems.

So the only way I have found is to leave the bios in Default mode and only touch the voltage in Volts of the whole CPU adaptively, that is, via the Global Core Svid Voltage.

This solution found is not definitive and only temporary, because the problem seems to reside in the microcode of the algorithm that manages these tensions. So like everyone else I'm waiting for the new bios in August.

[Silent_Scone]

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@vincio wrote:

This solution found is not definitive and only temporary, because the problem seems to reside in the microcode of the algorithm that manages these tensions. So like everyone else I'm waiting for the new bios in August.

---

It's because the CPU isn't fully stable with such a large offset. It should however be stable across both the new and previous build if one keeps to the profile rules and doesn't undervolt the CPU. You'll probably find that stability is still somewhat conditional. Also please note by setting Adaptive Mode and then applying a Global Offset this is applied to the entire VID stack