7950X3D Memory Stability Issues

Hi, I’ve built a new PC about three weeks ago and have had issues with memory stability ever since.

CPU: 7950X3D
Memory: G.Skill Trident Z5 Neo DDR5 6000
Motherboard: Asus TUF GAMING X670E-PLUS WIFI
Full parts list: pcpartpicker /list/4jWRrD (apparently I’m not allowed to post links, wtf?)

The errors manifest as bluescreens on windows, kernel panics and random freezes on linux, as well as crashing applications.
Bluescreens usually have a “memory management” error message and most kernel panics are preceded by “bad page state” errors.
These errors usually show up within about an hour of turning the system on.
I also ran memtest86 lots of times, sometimes it passes, sometimes it fails seemingly at random.

The errors seem to be more common with EXPO enabled but also show up with completely stock memory settings.
On the other hand, yesterday I ran y-cruncher for 12 hours with EXPO enabled without any errors whereas the system usually fails after 20-60 minutes.
I also tried the supposedly “easy memory timings” from a buildzoid video but that was even less stable than EXPO. I realize this came out before 7000x3d was a thing, not sure how much the recommended settings would differ for these new chips.
Still can’t post links, video title is “Easy memory timings for Hynix DDR5 with Ryzen 7000” on youtube.

Thinking the memory was faulty at first, I RMA’d it but the issue persisted. By now I have completely ship-of-theseus’d the whole PC, one by one replacing not just memory (same model) but CPU (same model), motherboard (ASUS ROG STRIX X670E-A GAMING WIFI), PSU (Gigabyte P750GM), and SSD (Mushkin Vortex 2TB) with no different results.
The only part I didn’t replace is the CPU cooler but temps always looked fine btw, about 40 C at idle and 60-80 under load and it isn’t an electronics component so I doubt that’s the issue.
The memory kit was not on the QVL of the original motherboard and vice versa, however it is on that list for the new motherboard.
I’m ran the latest BIOS version from a week or so ago on each of the boards.

Having essentially built a whole second computer for diagnosing this, I’m completely out of ideas and humbly ask for your help.

So… It’s stable with expo?

Expo is not a dirty word, at least not with latest bioses. 1.1v and 1.2v for soc is fine and fixes memory.

Wendell

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It ran y-cruncher fine yesterday for 12 hours straight with EXPO enabled.
But then a few hours later it crashed again without me having changed any of the settings.

And latest bios? What soc is it calling for with expo on? Can you take a pic of your motherboard memory area to show how youve got it installed?

We can probably nudge vsoc 0.05v but there was probably a bios update yesterday or the day before.

I just reset all bios settings to stock and ran another y-cruncher stress test. System crashed after about 30 minutes. No expo involved. That’s even below the 5200 MT/s that the CPU should support.
The Stock settings show as 4800 MT/s and 40-40-40-77 primary timings.

I’m running the latest bios version 1410 from 9 days ago.
The sticks are installed in the slots recommended for 2 DIMM kits by the motherboard manual (slots 2 and 4 counting outwards from the CPU).



without expo you will still need 1.1v soc I think.

I tried 1.1 and 1.15 VSOC but I still get crashes.
Also tried lowering the memory speed to 3600 MT/s but even that is still not stable.

Any other ideas I could try?
Maybe I’ll get a non-asus motherboard. Seems like they need to sort some shit out with their motherboards.

have you tried adjusting the terminantion ohm value…
for months i was running 3000 ram at cas 14 but would get random bsods.
the frequency of which would start increasing as the months went past.

i ran ryzen dram calculator.
i compared both setts of timings from each of the optional tabs showing safe and fast.
1 noticed that fast used different values for the termination block and cad bus block. set to 60 from 68.8
after adjusting these im using ddr4 my ram became rock solid.

so might be worth playing with to see if it helps you.

waaait… jedec spec is what, 4200? 4600? that’s what it would be running at with 1.1v SOC.

If you want to run above that, give it 1.25v. or 1.27v.

Loading expo and setting SOC to be 1.27v is 100% safe.

I tried stock (4800 MT/s) with 1.1 and 1.15.
With expo or when manually setting the frequency I used 1.2-1.3 VSOC.
Neither of those were stable.

Bought a third, non-asus motherboard now. MSI Mag Tomahawk. Hopefully that will work.
After watching the recent GN videos I don’t really trust my asus boards anymore.

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Take a look at this one:

Yes, that’s one of the ones I was referring to.
Around 3:30 they mention having similar issues with memory stability at stock settings.

System has been running fine with the MSI board for over a week now.

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