Ryzen 9900X and 192 GB ECC memory

[kiwi291]

I need to run 192 GB RAM ECC.

Initially I tried to put together a set of AMD EPYC and RDIMM, but the cost is very high. So I'm thinking of trying to put together a kit based on something more standard.

Suggestion:
AMD CPU 9900X

https://www.amd.com/en/products/processors/desktops/ryzen/9000-series/amd-ryzen-9-9900x.html

2x1R DDR5-5600
2x2R DDR5-5600
4x1R DDR5-3600
4x2R DDR5-3600
System Memory Subtype - UDIMM
ECC Support - Yes (Requires mobo support)

Memory:
4x 48 GB DDR5 ECC UDIMM

ME44800-4828K4-G

DDR5 5600MHz PC5-44800 ECC 288-pin UDIMM

NEMIX RAM DDR5 5600MHz PC5-44800 ECC 288-pin UDIMM PC Desktop memory upgrade. Enterprise level quality backed by Lifetime Warranty built with major brand chipset and multi-layer PCB. This is much higher quality than shielded gaming memory. Meets and exceeds DDR5 288-pin Jedec Standard with...

nemixram.com

or:
KSM56E46BS8KM-16HA

Kingston Server Memory: DDR5 5600MT/s ECC Unbuffered DIMM - Kingston Technology

Kingston Server Premier memory is designed for Data Centers. This Memory specification is: DDR5 5600MT/s ECC Unbuffered DIMM

www.kingston.com

Motherboard:

PRIME X870-P - Specyfikacje

PRIME X870-P to płyta główna oparta na platformie AMD X870 (Ryzen AM5), kompatybilna z Advanced AI, z obsługą dysków PCIe 5.0, czterema gniazdami M.2

www.asus.com

ECC and Non-ECC, Un-buffered DIMM*.
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

Theoretically it looks compatible. DDR5 ECC seems to be supported for both CPU, RAM, mobo. Theoretically it will work.
I have no experience with such kits, so please give me your opinion.

Will the ECC functionally work?

Or maybe abandon this crazy idea and go for server solutions like AMD EPYC, server motherboard and RDIMM memory?

 

[unwind-protect]

Nemix is junk.

I have numerous recent AMD consumer-class systems when ECC UDIMMs work. I know because that Nemix junk threw errors

 

[ir_cow]

Kingston or Crucial is the way to go. Also On-Die ECC function which all DDR5 has is not the standard ECC. It only stops bits from flipping in a resting state.

 

[kiwi291]

@unwind-protect thanks, Thanks, this is valuable information. But crucial only has 32GB sticks. So only kingston. I haven't found any other dice with 48GB with ECC.
@ir_cow But the asus board I cited, along with kingston memory have true ECC. Unless i am wrong?

 

[A Computer Guy]

V-color also has DDR5 48GB ECC sticks. Don't bother getting the 6400MT/s ECC it's probably not going to work at that speed even with 2 DIMMS. I've started working on getting a set of those sticks 96GB to work (at a lower speed) on my system. Crucial worked great on my system at 5600MT/s but that was only 2 DIMMS 64GB.

 

[unwind-protect]

@ir_cow But the asus board I cited, along with kingston memory have true ECC. Unless i am wrong?

It should do it. Asus and Gigabyte will usually do ECC when they say so. MSI will not.

 

[A Computer Guy]

Or maybe abandon this crazy idea and go for server solutions like AMD EPYC, server motherboard and RDIMM memory?

Instead of doing big EPYC you can do little EPYC (AM5) but as far as I know those aren't advertised to work on consumer AM5 motherboards so you get server boards with limited I/O options on top of limited PCIe expansion slots of AM5. Used Zen2 threadripper is pretty cheap on the used market. Often whole systems popup like 3970x with ram and motherboard under $1000 and those take cheaper DDR4 UDIMM ECC.

 

[Panther_Seraphin]

Threadripper would be my thought for this sort of requirement with a recentish CPU setup.

IF its purely a RAM limitation then why not older Server hardware? Easily reach that memory for cheap.

 

[igormp]

On level1techs there have been some folks running ECC UDIMM 4x48GB setups, at around 4400~5200MHz

Not sure which specific sets they were using tho

 

[freeagent]

Best I can do with 4 DIMMs on my 9900X is 4800.

Kind of a bummer.

Probably my board.. don't have the money to confirm

 

[igormp]

Best I can do with 4 DIMMs on my 9900X is 4800.

Kind of a bummer.

Probably my board.. don't have the money to confirm

Have you tried Asus latest BIOSes? I finally managed to achieve 5200 with my 4x64GB set with one of the beta BIOS.

 

[thesmokingman]

Best I can do with 4 DIMMs on my 9900X is 4800.

Kind of a bummer.

Probably my board.. don't have the money to confirm

Really? When I built a 9950x3d recently it ran at 6000 at 192gb density without much issue. The board was a CH4 Hero...

 

[freeagent]

I will have to try again then.. I am on the newest bios.. cannot roll back..

I dont see why the CPU couldnt do it. It can do 2200FCLK, 6400 mems, boosts high on the first CCD..

It is 4x 16 too, so not even a heavy load on the IMC.

Dammit.

 

[thesmokingman]

I might have exaggerated, build so many rigs you forget details. I went back thru the screens I posted and remember now. 4x48gb (7200) ran 5600mhz w/o issue. It took a bit of tweaking to get 6000 and I ultimately brought it back down because it's a production machine. Then a little while later I split the ram to 2x48, and built a second rig 9950x and 3090 for a backup team render rig. Both setups took rated 7200mhz speed w/o issue.