CPU bottleneck still after replacement

[Muki]

Specs : Ultra 9 285k / Asrock Livemiexer z890 / Arctic Liquid Frezzer 3 420mm / Super Flower Leadex vii xg 1300w / Nvidia rtx5080

Hi, I replaced the motherboard and CPU because a bottleneck appeared and the processor stopped reaching maximum clocks. Both requests for the Asrock Livemixer z890 board and the Core Ultra 9 285k CPU were accepted and I got new ones. I thought it might be CPU degradation because of using OCCT, but Asrock assured in an email that the VR out readings were wrong and they are working on a solution. 

Now with a freshly updated BIOS, mounted cooler, and generous dose of thermal paste, my PC is still stuck at 5.3 GHz max turbo P-core. Even when enabling Intel's new boost option and setting BIOS power mode to "ASRock Extreme," 

I did Memtest86 today and got 1 error in test 7, repeated in every pass. New memory doesn't have that error, but the bottleneck still exists. 

The CPU just doesn't want to draw 250w and reach max clocks with everything enabled.

Is there some way to diagnose reason? There's only one PSU left to check, but I don't have working replacement at hand and to asking for replacment requiere good reason,

Edit: Changing back to "Intel Default" gives Intel Extreme Tuning Utility readings of "Power Limit Throttling" and "Current/EDP Throttling."

[RobbieR_Intel]

Hello Muki,

Thank you for providing the detailed background and steps you've already taken. I understand how frustrating it must be, especially after replacing major components and updating everything.

I'll further look into this internally and will get back to you once appropriate information is available.

Best Regards,

Robbie R.

Intel Customer Support Technician

[RobbieR_Intel]

Hello Muki,

Thank you for patiently waiting. Regarding the issues that you are encountering and for your queries, you may refer to the following articles:

• My Intel® Core™ Processor Does Not Reach the Maximum Turbo Boost Frequency
• Why the Processor Frequency is Operating Below the Base Frequency for Some Intel® Core™ Processors
• Why Is My Intel® Core™ Processor Stuck at a Certain Frequency?
• My Processor Constantly Runs at Low Frequency, Causes System Lag

Additionally, I suggest running the Intel Processor Diagnostic Tool (IPDT) to check if the processor is functioning correctly, as the frequency depends on the workload due to Turbo Frequency.

Then, running the Intel Extreme Tuning Utility (XTU) stress test can also help confirm if the processor can achieve high frequency. 

1. Download and open XTU 10.0
2. Select "CPU Stress test" for about 10 minutes or more.
3. Click the wrench icon and select "All" to record all monitoring details
4. Enable "File logging" to record the test and start the CPU stress test
5. Share the logs of the stress test by opening the "Folder" icon

For an example, you may refer to the screenshot below:

If you need further clarifications, please let me know.

Best Regards,

Robbie R.

Intel Customer Support Technician

[Mike_Intel]

Hello Muki,

I hope this message finds you well. 

Were you able to check the previous post?

Please let us know if you still need assistance.

Best regards,

Michael L.

Intel Customer Support Technician

[Mike_Intel]

Hello Muki,

I hope you are having a good day.

I am sending another follow up to check if you still have questions or clarifications. 

Since we have not heard back from you, I need to close this inquiry. 

If you need further assistance, please post a new question as this thread will no longer be monitored. 

Thank you and have a great day. 

Best regards,

Michael L.

Intel Customer Support Technician