RAM stability issues on Apex Encore 14900ks

[SinisterDev85]

Hey ROG Fam. Decided I needed to create a separate post for the crazy RAM issues I'm experiencing with my build.

So I've been get the hang of tuning the 14900ks. While leaving memory on Auto, I've managed to tune the CPU to to pass various stress tests and benchmarks now without thermal throttling. 

The RAM troubles im experiencing are driving me crazy! I have two kits. A Dominator Titanium 48gb 7200MT/s and a Trident Z5 8000MT/s. I finally moved onto trying to get ram stable at any XMP. I don't really wanna go the long, tedious, and unfamiliar route of tuning the Ram manually to squeeze out every drop of performance. I'd be perfectly happy just getting either of them running at XMP speeds, or a little lower, if necessary for stability. I've seen sooo many posts and videos claiming "the Encore should be able to do 8000MT easily", and yet I can't even get a 7200 kit stable.

I know there's 5 key voltages to play around with. I've been trying to keep SA at 1.2v and focus on others first, because supposedly raising it higher can introduce other stability issues. So far neither kit will run at  XMPII, even if I bump up  VDD, VDDQ, VDDQ transmitter, and MC voltage a bit. Literally the best case scenario I've achieved is getting Windows booted and running a RAM test on OCCT and had it start throwing errors rather quickly, but not crashing. Once I achieved that much, i created a save profile to revert back to. Because my other attempts have lead to far worse outcomes. Mostly a plethora of BSODs just attempting to log into windows. Corruption of files that had me needing to run SFC, DISM and eventually reinstall windows fresh, again. It's been a nightmare.

Im genuinely hoping there isn't something wrong with the motherboard itself. Because its seen 3 cpus and 2 ram kits now. The current 14900ks is SP 101. Decent bin. MC score is supposedly 87. Much better than the 70 on my first 14900k. Yet still in RAM hell.

Is there anything else that could be causing this problem? I did see it mentioned that torquing down the AIO block to the contact plate too tightly can cause memory controller issues. However Ive readjusted the block several times and I've only tightened down the thumb screws by hand. No screwdriver used. So I don't think ive over tightened them. 

Im just trying to think of anything that could be causing me so much trouble getting this system stable. Cpu finally seems good and yet the RAM, which this board is supposedly the best for, has been maddeningly difficult to get stable. Perhaps there are some bios options that effect memory that im overlooking? Any recommendations for memory tweaks that might help me get this system stable finally?! 

[Silent_Scone]

You didn't ask anything in particular, just vague concerns about instability.

Nobody can give you the information you're looking for. That's why there are no active guides - it depends on the CPU.

There are some tips here as well as associated voltages that may require adjustment.

https://rog-forum.asus.com/t5/push-the-limits/z790-apex-the-8ghz-goal-and-beyond/ba-p/938283

[Yuvaletzi]

So as soon as I build it can I share with you my sp scores and vf curve and you could help me stabilise my system and share with me the settings / adjustments I need to look for?

[Silent_Scone]

Sharing the fused V/F curve and SP score won't help me tune your system. Get up and running and see where you need assistance first.

[Yuvaletzi]

Alright my friend I’ll keep you updated then! 
btw assemble the PC > post for the first time > install Nvidia drivers > update bios and try run xmp > install armoury crate that good order ?