SOLVED: ASUS Pro WS X570 Ace goal of 128GB ECC ram, possible?

I am currently running the following setup

  • ASUS Pro WS X570 Ace
  • Ryzen 5950x
  • 2x32GB Kingston Server Premier RAM @ 3200MHz CL22 DDR4 SDRAM DIMM 288-pin

sadly, I tried to buy a second same kit to get to 128GB of ECC RAM … and was met with either solid yellow lights in the Mobo… OR it would boot and only recognize 64 GB…

I did some research but wanted to check in here as well… that there is this Samsung module which a random reddit post claims will work to get me to 128GB … I guess now I need to return this new set of kingston AND sell my original 64 GB of kingston… in order to get 4 sticks of this

M391A4G43MB1-CTD

32GB DDR4-2666 PC4-21300 ECC UDIMM

Before I realized it wouldn’t work… I tried different combos with the two kingston kits, same spec same timing same everything except the last two letters in their SKU … I even tried booting in a lower clock speed of 2666 with 64GB. and then adding in the next kit… no dice.

before I go to the trouble… is the only real way to do this correctly is stick to the QVL then…?

but then where are people getting this Samsung kit from?? is it skhynix under the sticker or…?

Thanks for reading

EDIT: I checked and… my original kit is on the list… the new kit in my hand has an “HC” at the end… and then I started googling

ksm32ed8/32hc vs ksm32ed8/32me

seems it’s some hynix stuff?? but they do not seem to want to play together… they work separately but not together…

Here’s the kit I started with

In the specs, it says:
Kingston’s KSM32ED8/32ME = Module Assembly (DRAM: MICRON (E-DIE))
Kingston’s KSM32ED8/32HC = Module Assembly (DRAM: HYNIX (C-DIE))

If it helps!

I run same mobo, 5900x and 128 Micron RAM ECC without any problems

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Have you tried manually setting the speed down to 2133 with one of the kits installed, rebooting to ensure it’s running at 2133, then shutting down and installing the other kit to see if they’ll work in tandem at 2133?

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Thank you for the replies. I can try it… just this setting here I imagine ?

EDIT: duuude @ScottishTom you nailed it… I had only tried 2666 ! Thank you!

I guess it’s too much to ask why 3200 doesn’t work if it’s on the QVL … but thank you! guess I don’t need to return the kit now! time to load some hugging face models

image

That’s a bit odd that it only works clocked all the way down. Have you updated the BIOS on the board? There have been a lot of BIOS updates for that board it seems, several of which are related to DRAM compatibility/stability. Though uh, if you do need to do updates, recommend removing one of the kits while you do so! Who knows what kinda fun could result.

It could also be something like the “AI Overclock Tuner” or one of these numerous “Auto overclock” settings that I dislike so much in the ASUS BIOS causing you trouble - 128GB of RAM on a consumer platform is still kinda edge-case enough that it’s so easy to have problems with it. Unfortunately I don’t know enough about the X570 platform to really go suggesting specific tweaks, but it could be worth bumping voltage ever so slightly to the memory controller (if an option) to see if that helps.

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Thanks again , and yeah I flashed the bios maybe back in November - Early December

I’ll leave it as is and make sure it’s stable but would be open to trying some tweaks to learn from this experience… it definitely didn’t like 2666 with otherwise stock settings… I’ve had to wipe the CMOS when it goes into a solid yellow so… it shouldn’t have anything fancy set

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You might try getting a 4x batch of Micron 3200 ECC. It’s super cheap coming from china rn, and you’ll know it’s the same micron sticks. It’s working great for me on a low-end x570 board and 5900x.

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nice… since the downclock trick worked… I will leave this be for a while…

With my luck this will work for a year or two , enough to see how AM5 and 5090 +++SuperRTX comes out… to assess what to do next.

im just a hobbyist with this stuff so it’s not the end of the world if it’s not running at 3200Mhz

Went into the bios and… seems the memory voltage was not choosable…

I switched off the main auto AI thing but that was more for the system CPU voltage I think

Processing: IMG20240106222255.jpg…

When I goto DOCP like in this short YT clip… I have no profiles available

Guessing im not supposed to do them (the profiles) myself…? sorry for the noobish questions just never had to touch this area before…

Okay slight update, after browsing some more YouTube’s I saw one of the overclockers simply type a voltage out … so I realized it’s not a drop-down at all … went back in … bumped the dram voltage

1.25V
2666Mhz
128GB ECC

It seems to work ! I’m testing it a bit now (battlefield 4 :joy:)

Edit : stopped at 2866 mhz , again really thankful for the help … never had to fiddle with memory at this level before … But also never had ECC before

Took a risk and decided to clock up to the full 3200 Mhz as it is rated on the packaging

Rebooted into windows and Linux running jobs… seems perfectly happy . Big thank you again :pray:

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Nice one, I’m glad you got it all running as expected :slight_smile:

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For anyone stumbling upon this thread wondering - the ME variant consumes approximately 2.48 watts less than the HC viariant at ~12.85 watts versus ~15.33. This may be why the voltage has to be increased as the motherboard may be supplying the lower power of the variants across all modules. I currently run two KSM32ED8/32ME with this motherboard, and in my experience the voltage of the RAM in this configuration needs to be upped from the factory defaults in order for the system to be stable at the advertised frequency of 3200 MHz any way. I ended up in this thread for checking whether this motherboard can run with 128 GB - good to have it confirmed, and I’ve thus ordered another kit of the HC variant to pair with my ME kit just like the OP did. It would be interesting to hear if anyone has tested four 64 GB modules for a total of 256 GB.

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