Instability/Program crashes

[Adalyia]

So I'm running a 13900k, Asus Prime Z790-A WIFI motherboard, and a G.Skill 2x32GB 6400MT/s memory kit and with XMP enabled and no other overclocks/settings changed I don't get BSODs/OS crashes but I do see applications crashing with access violation exceptions, these disappear when running at jedec settings but given the kit is on the QVL list I'd like to try and get the full rated speed out of them if possible. These issues were also present on a different memory kit beforehand but I'd chalked that up to the previous one not being validated on this specific board 

 

So far I've tried:

• Lowering the frequency
• Loosening the timings a bit
• Re-seating in different slots and the same ones
• Increasing the memory controller and system agent voltage slightly
• Updating to the latest bios version

And none of these have really worked. Is this just a memory controller or board issue or are there other steps I should be taking to try and resolve things?

 

 

[noname8365]

13900k is a pretty powerful processor so depending on your cooling it can be unstable off the defaults.

Try running Prime95 Blend with the jedec settings for a few minutes and see if that is the case.

If Prime95 Blend doesn't crash, turn the XMP on and see if y-cruncher VT3 crashes and if it does then you know for sure it is related to the RAM. You should be able to run 6400MT/s though so probably it's related to the CPU and its settings and you need to tweak it a bit.

[marcgii]

Honestly those QVL RAM kits are only a suggestion that the RAM may work at the rated speed.  In any case, the issue might be the motherboard.  I imagine the Asus Prime series is relatively poor for memory overclocking.  That being said, 6400 is a modest OC.   If you enable XMP and then manually set the clock to 6000, is it stable?  You need to use a dedicated tool to verify stability like the ones mentioned in the post above or Memtest86+