cancel
Showing results for 
Search instead for 
Did you mean: 

FCLK in auto crashes the pc whit ryzen 7800x3D

dashky
Level 9

Hello, my PC crashes when I start it from cold when I put the FCLK in auto.
I don't know if it happened to anyone else.
In the end, searching in the bios configuration I found that setting the FCLK between 1500 and 1600 solved the problem.
my CPU is ryzen 7800x3D on a ROG STRIX X670E-F GAMING WIFI

668 Views
2 ACCEPTED SOLUTIONS

Accepted Solutions

dashky
Level 9

I have been testing for a few days and I have set the RAM to 5600mhz with a voltage of 1,250v and the FCLK to 1400mhz and it already seems stable
and I consider the issue resolved
thank you

View solution in original post

dashky
Level 9

In the end I discovered that it was not the RAM problem, it seems that the problem was the CPU
I have disabled the automatic CPU overclock in the bios options and it is now 100% stable
It seems that the silicon did not come out too good

View solution in original post

19 REPLIES 19

Jiaszzz_ROG
Customer Service Agent

Hello, @dashky 

Thank you for reaching out to us.
We noticed you have another inquiry regarding BIOS settings: ccd priority memory activity threshold
Could you please provide your current BIOS version, a screenshot of the BIOS main page, RAM part number and specification, and details about the usage scenario where you need to adjust the FCLK settings?
The Infinity Fabric Frequency and Dividers (FCLK) are crucial for enhancing core communication speed and system stability.
The optimal configuration depends on your installed hardware, so testing and adjusting may be necessary to achieve the best setup.
Under the conditions of clearing CMOS and restoring default BIOS settings, do you experience any abnormalities during the boot POST and system usage?

Thank you.

Due to the ongoing regional holidays, my responses may be slightly delayed.
Thank you in advance for your patience.‌‌‌‌ 🙂

dashky
Level 9

I have an Asus ROG Strix X670E-F Gaming WIFI Socket AM5 board with bios 1905
and ram Kingston Fury Renegade RGB 32GB 2x16GB 6400MHz CL32

I had to put the RAM at 6000MHz and the FCLK at 1500MHz because my PC crashed
I also tried to deactivate the automatic oc but I think it performs better that way
At the moment the PC seems stable

If I deactivate the core performance boost option it also seems that the PC becomes more stable
I have been told that it is because of the AMD-EXPO technology that overclocks the ram and works poorly

1709196612357.jpg

Jiaszzz_ROG
Customer Service Agent

Hello, @dashky 

Thank you for providing the relevant information.
May I ask if your current memory part number is "KF560C32RSAK2-32," and is it installed in the DIMM_A2 and B2 slots recommended in the ROG STRIX X670E-F GAMING WIFI User’s Manual?

Will you also experience crashes under default BIOS settings after clearing CMOS

Since overclocking settings depend on your hardware configuration, including CPU, RAM, PSU, etc., manually adjusting parameters might lead to better results than using the Auto presets.

Thank you.

Due to the ongoing regional holidays, my responses may be slightly delayed.
Thank you in advance for your patience.‌‌‌‌ 🙂

The serial number of the ram is KF564C32-16
If they are correctly installed in slot A2 B2
With the default configuration with everything on automatic it does not crash but the ram then goes to 4800mhz but if you increase the frequency of the ram it already crashes

Jiaszzz_ROG
Customer Service Agent

Hello, @dashky 

Regarding the BIOS settings, could you please provide the detailed brand and model names of the GPU, SSD/HDD, and PSU currently installed for us to further confirm the settings?
Concerning the memory, is the part number you provided supposed to be "KF564C32RS-16"?
Whether it's KF564C32-16 or KF564C32RS-16, neither is listed in the ROG STRIX X670E-F GAMING WIFI memory QVL.
Additionally, "KF564C32RS-16" seems to be a single stick of memory. Mixing and matching DIMMs can result in failure to boot and compatibility issues. 
Please refer to [Motherboard] How to query (CPU/memory) QVL List? and the "purchasing and installation guide" at the top left of the QVL page for instructions on installing memory to ensure compatibility and stability.

Thank you.

Due to the ongoing regional holidays, my responses may be slightly delayed.
Thank you in advance for your patience.‌‌‌‌ 🙂

There are two KF564C32-16 modules and they are well installed.
The PSU is from Asus 850w, the graphics card is from Asus too rx7700xt, with a Kioxia m.2
the problem is from AMD EXPO
and I'm not the only one that happens
They should put an option in the bios to disable automatic ram memory overclocking.

Jiaszzz_ROG
Customer Service Agent

Hello, @dashky 

After confirmation from the relevant department, it has been noted that with the manually set "Memory Frequency" at 6000, certain voltage and DRAM-related parameters won't take effect, leading to instability when running with the FCLK Frequency set to [Auto].
We recommend adjusting the EXPO feature directly for memory overclocking, and if necessary, consider cross-testing memory from the ROG STRIX X670E-F GAMING WIFI QVL.

Thank you.

Due to the ongoing regional holidays, my responses may be slightly delayed.
Thank you in advance for your patience.‌‌‌‌ 🙂

Hello, thank you, I have raised the RAM memory voltage to 1,350v and I have set the speed to 6000MHz and the FCLK to 1500.
At the moment it seems stable but I will have to do more tests