When the 14900k is under full load, the frequency is only 4.9 GHz.

[hao1104]

The 14900k can only boot when the multiplier is set to x55; otherwise, it results in a blue screen. Additionally, under full load, the P-cores only reach 4.9 GHz. Setting the Intel Baseline Profile in the BIOS also prevents the system from booting, and it cannot boot with all default BIOS settings either.

[VonM_Intel]

Hi, hao1104.

Thank you for posting in our Community.

I saw the image you shared, and I noticed that you're using a Samsung SSD 990 Pro 2TB. You mentioned that you can only boot when the multiplier is set to x55, otherwise, it results in a blue screen. I'm curious about what you mean by "multiplier." Additionally, Blue Screen errors can occur when a serious problem causes Windows to shut down or restart unexpectedly. Could you please let us know if there were any error codes or messages displayed when the Blue Screen occurred? These errors can be caused by both hardware and software issues.

Moreover, have there been any recent changes to hardware, BIOS updates, or software installations that preceded these issues? Understanding the timeline of changes might help pinpoint when the problems started.

Looking forward to your response. Have a nice day!

Best regards,

Von M.

Intel Customer Support Technician

[hao1104]

Since I started using the 14900K, this issue has been occurring continuously. My current BIOS version is Asus 1402, which has updated to microcode 125. However, under these circumstances, Windows still cannot start normally unless the P-core frequency is set to 5.5GHz, which means setting the P-core multiplier to x55 in the BIOS.

[CoolBook]

Hi!

Your system is overheating!

You probably need a better cooler, but even then it would be difficult to run all P-cores at high frequencies for long times.

Undervolting or other tuning might help. Disable Hyperthreading If you mostly play games or do lightly threaded work.

Reducing max boost frequencies could be necessary to keep the CPU below 80C. Temperatures above that could affect stability and/or longevity of your chip. 

[VonM_Intel]

Hi, hao1104.

If Windows only starts normally when the P-core frequency is set to 5.5GHz (P-core multiplier x55), it suggests there might be a stability issue at the default settings. I noticed that @CoolBook provided some tips and recommendations. How did that work out for you? Please let us know.

Best regards,

Von M.

Intel Customer Support Technician

[NormanS_Intel]

Hello hao1104, 

I have not heard back from you so I will close this inquiry now. If you need further assistance, please submit a new question as this thread will no longer be monitored.

However, I've noticed that you have another case created, and they have already assisted you with that case.

Best regards,

Norman S.

Intel Customer Support Engineer