i7-14700k / Gigabyte z790 Aorus Elite X Wifi 7 - Stability issue with 'default' settings

[ViperJS]

Hi - I have a new system build that appears to be unstable even under default bios settings and was hoping to get some guidance.  

System Specs: 

• Processor: i7-14700k
• MB: Gigabyte z790 Aorus Elite X Wifi 7 (F5 bios)
• Memory: DDR5 32 GB (2x16) (Note: I've tried two different different sets of RAM from the QVL list - both Corsair Vengance, one 6400 cl36 and one 6200 cl36
• GPU: GeForce RTX 4070 SUPER Gaming OC 12GB
• SSD: Samsung 990 Pro drive
• Cooler: Lian Li GA II lcd 360 
• PS: Seasonic Focus v3 850, atx3/pcie5

Symptoms w/ Default settings:

• 6400 Memory, XMP Disabled: Posts and boots normally, passes OCCT, CPU-Z and 3DMARK benchmarks and stress-tests.  Games run normally.  XTU benchmark fails/program closes.  
• 6400 Memory, XMP Enabled: Won't post / boot.  
• 6200 Memory, XMP Disabled: Boots/Posts Normally.  Fails OCCT w/ CPU Core Hardware Error. Fails XTU stress test.  Occasional bluescreens when doing basic tasks.  
• 6200 Memory, XMP Enabled: Boots/Posts Normally.  Fails OCCT w/ CPU Core Hardware Error. Fails XTU stress test.  Frequent bluescreens. 

I tried adjusting various memory settings like disabling high bandwidth and low latency, turning of auto-boost, etc.  And it always behaved the same.  

After reading this intel post  I tried setting my LLC to low instead of auto and all the above problems disappear.  So my question is, are these symptoms and need to up the LLC indicative of a bad CPU or bad motherboard? 

Or is it an issue with compatibility of the 'default' bios config where perfdrive is set to Optimization?   

If this is 'normal' to have to tweak voltage settings to get stability, I'm wondering if its better to adjust the LLC or to slowly adjust the "Dynamic Vcore(DVID)" to get to acceptable stability.  

Thanks! 

[Mike_Intel · Accepted solution]

Hello ViperJS,

Thank you for posting in Intel community Forum.

For the this issue, kindly open the community link where we posted our recommendations and follow the provided settings that you need to set inside the BIOS then tell us if there is an improvement. 

https://community.intel.com/t5/Processors/Updated-Guidance-RE-Reports-of-13th-14th-Gen-Unlocked-Desktop/m-p/1594553

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

[ViperJS]

Thank you I hadn't seen that post before.  Will test and let you know. 

[Mike_Intel]

Hello ViperJS,

I hope this message finds you well. 

I am just making a follow up to check if you already tried our last recommendation.

Please let us know if you still need assistance.

Best regards,

Michael L.

Intel Customer Support Technician

[ViperJS]

@Mike_IntelThank you for the prior reply and the follow-up.  I was able to use the guidance linked as a baseline and then tweaked slightly from there to balance performance/temp/etc.  Everything seems to be stable now. 

Thanks for your help. 

[Mike_Intel]

Hello ViperJS,

Thank you for the update and I am glad that the recommendation was able to fix the issue.

Sine the issue is fixed. 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