Could you please mention the model number of the Micron ECC Ram you use with your LGA1700 CPU? is it MTC20C2085S1EC48BR?
If so, do you know by any chance if it works in an Asus W680 with 13900k?
Where are the DDR5 ECC UDIMMs?
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If so, do you know by any chance if it works in an Asus W680 with 13900k?
Great info, thanks! But where does the 3600 frequency come from? I've been seeing JEDEC speed for DDR5 listed as 4800. Not that I'm gonna pay the few hundred bucks to download the official spec and see for myself...
I'm becoming more tempted to run a non-ECC high density, 96GB 5200 2-DIMM kit and just underclock to 4800 or 4400 for stability and watch this space to see how the standard develops in ECC flavors. Got about a month before I start pushing "Add to Cart" buttons, we'll see. Come on, SK Hynix!
And now there is something you can actually buy: Axiom AXG1075102162/1
- UDIMM
- DDR5
- 288 pins
- 4800 MT/s
- 72-bit-word ECC
- 1.1 V
- 48 GiB
See https://forums.servethehome.com/index.php?threads/lga-1700-alder-lake-servers.35719/post-370867. The JEDEC spec requires that the speed decline as the number of slots per channel/dimms per channel/ranks per DIMM increase. Most people do not know this. Supermicro follows the JEDEC standard strictly if the frequency is set to auto.
this is a memory-controller signal lines output load requirement.
this is not specified by JEDEC
Intel POR = Plan of Record
AMD uses similar rules.
but this BIOS behavior can be disabled:
Enforce POR
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Ah. You are right about who enforces the frequency reduction standard based on the load factor. In this case it is the CPU manufacturers, because the memory controller is actually on the CPU. I would advise that if you don't follow the rules specified by JEDEC and the CPU, then the reliability of the memory is not guaranteed. This means if a user wants to run "out-of-spec", they must do stress testing on the memory to ensure no errors crop up...
Interesting you had that much of an issue. My Asus W680 has seemingly worked since day 1 (I believe I was the first person on this forum to have the board). I just tested again with latest 2703 BIOS and 2x32GB HMCG88MEBEA. Memtest Pro 10.6 shows ECC enabled and passes with ECC error injection, also memorycorrection shows "5".
Kingston have 5200 and 5600 UDIMMs with ECC available now for ordering , 32gb modules, and I belive also 16gb modules should be available
SAMSUNG is only sampling 48 GB 5600 MHz DDR5 UDIMM modules (product code
M324R6GA3BB0-CWM), but faster and denser ECC memory is finally within reach.And that has now dropped in price to $229 at Provantage.
I'm sad that it's taking them so long to get the 48gb sticks out. It would make swapping my Epyc a no brainer
Note to self, don't buy "open box" from Provantage
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Holy crap, I had those added to my cart before I chickened out.
If you can wait a little longer… Micron Introduces 128 GB DDR5-8000 RDIMMs with Monolithic 32 Gb Die. 64 GiB ECC UDIMMs, here we go!
Can confirm 2x KSM56E46BD8KM-32HA (2x32GB) works at 5600 MHz on the Asus W680 ACE with i7-13700K with BIOS 2802. Passed all tests including ECC error injection with Memtest 10.6 Pro.
Old thread but this is still a bit of a problem. I see 48GB modules are available and shipping now from Kingston: KSM56E46BD8KM-48HM
Has anyone tried any of these on the W680 platform?
Has anyone tried any of these on the W680 platform?
Just in time to start waiting for 64GB modules now that the ASUS W680 motherboards supports those.