X399 MB ECC Confirmation/Clarification Thread

[Hammer!]

Don't know about those, but my VLP ct16g4xfd824a sticks hit the following @ 1.27V.
View attachment 134686

I could go with more aggressive timings, but then that would be more voltage on a 24/7 system.

Wow! I tried 2666 with 20-20-20-50 at 1.35v and I can’t seem to get through even 1 pass of memtest. I am using 4 sticks of CT16G4WFD824A on Aorus x399 gaming with a TR1950X. Any suggestions on settings I should try?

 

[Abby Normal]

Wow! I tried 2666 with 20-20-20-50 at 1.35v and I can’t seem to get through even 1 pass of memtest. I am using 4 sticks of CT16G4WFD824A on Aorus x399 gaming with a TR1950X. Any suggestions on settings I should try?

Wow, that is far more voltage than any 2400MHz Micron needs for 2666. I don't know what to say for your RAM, or mine for that matter. This thread would be my suggestion for main inspiration since he was using a single rank version equivalent effectively of my D9TBH RAM, and he was also pairing it with an MSI MB. So I used the memory Try It options it had in my BIOS, and they worked with fairly low voltage. This is just assuming your RAM chips say D9TBH on the bottom line. Search for whatever that says with Micron in your search query and read up on the results.

The major thing that seperates ECC RAM sticks from non are the 1 extra RAM chip per rank we have, so timings are interchangeable. You'd want to see other Ryzen results for best results.

Use no more than 1.28v when probing at the lower 2666-2800 speeds I would say. Less is probably more for voltage when getting it stable at these lower speeds. I'm not shooting for anything more since it passes Memtest86 and HCI Memtest to the point of exhaustion with a comfortable RAM speed that isn't bottlenecking Ryzen. I also compared times under Y-Chruncher with high memory loads and compared it to tighter timings under DDR4 2800 options, with 2933 taking the lead.

I'm comfortable here, though I know there is barely any limit to bottleneck elimination afforded by being aggressive with RAM speeds and Ryzen.

 

[mk553]

I know I'm late to the party, but I got an AMD Threadripper 2990wx on an Asrock Taichi x399 recently, and tried using CT16G4WFD8266 ECC Unbuffered Memory (16gb modules), and while memtest would pass, the system would hard-lock/freeze frequently. For now, I've had to switch to generic non-ecc RAM until I find a replacement. Hoping to find some information here on what else might work, preferably in 16gb density, as I need 64gb with expandability to 128gb.
Thanks!

 

[Aluminum]

Samsung Samsung Samsung

/signed, over half a terabyte of unbuffered samsung ECC running on Zen cores, all at 2933 or better.

Usual results for me are 128GB 8x16 16-16-16 or 32GB 4x8 14-14-14, both good configs for different use cases.

 

[Joust]

Samsung Samsung Samsung

/signed, over half a terabyte of unbuffered samsung ECC running on Zen cores, all at 2933 or better.

Usual results for me are 128GB 8x16 16-16-16 or 32GB 4x8 14-14-14, both good configs for different use cases.

Hate to Necro, but this is on point. I have a 1950x on a carbon pro, using non-ecc RAM. I have a second 1950x with a gigabyte board coming, and I'd like to use ecc ram. Fast isn't really important, stable and inexpensive is important. Server duty. What would you recommend as a part number for 16gb sticks?

Aluminum

 

[Jandor]

Interesting. Running Asus B350m-k with dual Kingston ECC 2x4GB 2.4Ghz, Asus B350m-A with 4 Kingston ECC 4x16GB (micron) 2.4Ghz, Asus B450M Pro Tuf Kingston 4x16GB (micron) 2.66Ghz + Ryzen 3900X, Asus B450M Pro Tuf Kingston Kingston 2x8GB ECC 2.4 and no problem on any of theose. ECC working, everything works. I think the non mciron chips are hynix. Didn't have to tweak anything. No OC anywhere. Windows 7 Pro. Spectacular stability. Not one glitch. I don't even shut down some of these. They run 24/7. All with raid 1 2xSSD and 2xHD, all sata.
Better than my old Q45+C2Q system with Vista 64 for now about 12 years old.