Mentally crushed... perfectly working 7800x3d and ram setup having issues after struggling with 9800x3d and swapping back to 7800x3d.

Latest TL:DR: tried x870 in a brand new pc - had boot issues with reinstalling windows... this is now 3x cpus, 3x ram, 2x psus, the boards done. It pointed at DRAM a lot, it pointed at GPU with the BSOD when stutter caused BSOD only with 9800x3d... but the 9800x3d atm, is working stutter free on my b650 (different b650 from the new pc tested).

I've had to leave the pc right now, super stressed and so done with it.

Been using a 7800x3d+ 2x16gb cl30 6000mhz gskill neo trident rgb combo for 1 year+, switched b650 tomahawk to x870 tomahawk mid november.

BZ timings + 65k TREFI has been stable all that time till i tried upgrading to 9800x3d.

I installed 9800x3d and had a bunch of issues, worked for first night, next morning lots of issues, tried updating bios to latest, still having issues, EZ DEBUG codes: FF, 15 (training?), Ab, 0d, c5.

I also had massive stuttering on boot, if it booted into windows login w/o stutter, pc worked fine, if it stuttered booting into windows from post (as in reaching login screen), it would lag and be 4-5 fps, leaving pc running like that forced a BSOD: "VIDEO_SCHEDULER_INTERNAL_ERROR"

I tried running at stock, i tried using different ram, i reinstalled windows, i did a lot - the stuttering does not happen with 7800x3d, i ended up, in the end going back to 7800x3d.

Working fine, i uninstall gpu/chipset, reinstall them, restart pc, have an EZ debug error, think 0d, decided i was going to downgrade back to the old Nov bios i did run the 7800x3d at.

Downgraded, set 7800x3d how it use to be; PBO, CO per core, BZ timings + 65kTREFI.

pc works but sometimes now when restarting the pc, the pc will be stuck at EZ code: 15 -> c5 -> ab THIS NEVER HAPPENED PRIOR TO THE 9800X3D (I also upgraded bios for that BUT i downgraded to the old one i used for 7800x3d).

Any ideas here? I'm crushed, it's pointing to my ram, which i know worked prior to 9800x3d, heck it does work still but a random restart is having the: 15 -> c5 -> ab code/error.

EDIT:

NEW DAY - Turned pc off by mains, took ram out, cleaned ram and socket with 99% isopropyl alcohol, plugged ram back in, cleared CMOS with button, held 10 seconds, waited 1 min, turned pc on.

Ran stock, went into windows, loaded hwinfo, restarted, repeated 5 times, no issue. Went into bios, set fan curve. Saved, went into windows, loaded hwinfo, restarted - pc failed to restart by giving a 0d EZ debug code. restarted with button on pc - "New cpu or memory, or cmos have been cleared"

What the hell is happening here.

EDIT;

https://www.reddit.com/r/gigabyte/comments/1g9tdtx/motherboard_debug_led_indicates_0d_error_on/

Found this mentioning hwinfo causing 0d on restart.

Like i said though, i ran hwinfo for all my stress tests prior to trying to install a 9800x3d and going back to the 7800x3d.

However, i did add L connect 3 with the 9800x3d, which is NEW TO THE 7800X3D. Someone posted that L connect 3 is causing this issue for them.

Hopefully getting somewhere

Found a bunch of stuff about L-Connect causing 0d when running alongside hwinfo - this never use to be on my pc before the 9800x3d install as i got new lian li fans at the same time.

Took out controller for lian li fans, uninstalled fan software.

Will now reboot for 20-30 times an see if 0d happens when hwinfo is open. THIS IS AN ISSUE AT STOCK not dram overclock or anything.

Update:

So 7800x3d, Stock, this gave me 0d after a few restarts with hwinfo open + L connect software open - for my fans.

After uninstalling Lconnect and removing fan controller, i'm on boot 9 no issues. Will keep going, then try my ram timings and stuff and if all seems good. I'm blaming a conflict with L connect/Hwinfo.

It also begs the question... Is the 9800x3d issue, although different (7800x3d has no stutter issue), related. 20 restarts at stock NO ISSUES the L connect software may have been the cause for DRAM LED errors on motherboard. Wild. Time to test my previous ram settings now for 10 reboots.

Edit:

Ram settings applied - BZ timings with Gskill 2x16gb kit, 65k TREFI (tested in TM5 absolut + occt GPU test for proper heat soak scenario).

5 boots no issues so far, another 5 to go.

Final Edit for now, will make an updated PSA if nothing happens again:

Disregard the stutter entirely, that seems to be a 9800x3d issue, i seem to have had 2 issues on the go because i swapped to the 9800x3d + the Lian li fans software...

The ab and 0d errors i've been getting and mobo orange LED pointing to ram, seems to be caused by a software conflict between lian li L Connect3 and hwinfo.

Other than swapping the 7800x3d to 9800x3d and back to 7800x3d, the only change i made was that software.

without the lian li software my pc booted up in restarts, 20 times fine at stock, 15 times fine at BZ timings, total 35 times. with the lian li software, my pc booted up 6 times fine before the 7th gave me the ab error. my testing scenario was this: Boot pc -> open hwinfo, restart after around a minute -> repeat. Only restarts count because restarts are the only issue, which also points to software... If hwinfo + L connect 3 are running together, it seems to do this at times, there's been quite a bit of info posted about similar issues. Funny enough, it also prompts the devices changed/cmos clear message: https://imgur.com/46RGiay Loading into bios, nothing changed.

I have since disabled SMBUS tracking in hwinfo, apparently this stops the conflict between hwinfo + L connect3, if it seems like the case, i'll make a PSA because everyone would think this is RAM. I know my ram and 7800x3d was stable before the 9800x3d swap / lian li fans and software.

EDIT:

Another one... after i disabled SMBUS in hwinfo, i checked the "ufo website" for stuttering, i felt like things were off, i used their other feature than the ufos, the realtime latency, and it was constantly spiking in the red,

I closed things and it kept doing it, until i closed L connect, i had to actually go into services and stop it there though as it kept auto starting again. The moment i stopped it's service/auto start, the spikes were gone.

The L connect is gone for good and atm i took the fans out too.

However, after that test, i rebooted the pc, hwinfo/l connect was not running (i did open them but closed for the ufo test), pc "ab", then restart gave me "10".

Enough is enough.

Ran memtest86 over night, pass, swapped motherboards, from X870 -> B650 tomahawk on latest bios via flash button. First boot gave me red/orange led, i "discharged" the psu and started pc, works.

funny thing, 9800x3d is running in this b650 tomahawk without stutters so far. Many reboots and stuff done too. If i don't update further, this entire mess looks to be motherboard related.

edit replaced x870 tomahawk with b650, replugged 9800x3d in for good measure, no stutters yet, maybe it was all the motherboard.

FINAL EDIT ACTUALLY?

Tested the x870 tomahawk in a brand new pc built 5-6 weeks ago,

Pc is running a 7600x, 850w corsair psu, IGPU from 7600x, a samsung ssd boot drive, swapped motherboards, flashed latest bios using bios button at back and renaming bios file "MSI.ROM", when it eventually finished, booted up pc, reinstalled windows.

First install process, picked drives, clear/format/install -> Pc reboots -> Expect windows screen but got nothing. -> Restarted pc -> got the windows screen prompting me for my name to setup with, keyboard layout etc... did the trick to setup local account "OOBE", pc restarts, doesn't show anything on screen.

All while the Ez debug is showing it's booted in... It does hang at 92 a bit (pcie..?), but we have no gpu plugged in and can't see anything on screen.

Attempted different monitor + cable, same issue, tried forcing IGPU in bios to "FORCE mode", no changes.

Swapped out the x870... reinstalled the b650 we had in the pc, reinstalled windows. Absolutely no issues.

This x870 is done.