Looking for a motherboard that supports 192gb memory LGA1700

Mason64 said:
Hi
Am building a system that i want to have 192gb of memory with the intel i9 1400k but cant seem to find a motherboard that takes 192gb, all the specs say 128gb.

Can anyone recommend any for me on OCUK web site? i have the system in the cart ready to buy its the following
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You should rather consider a Threadripper or an older Xeon system.

Running all 4 DIMMs on consumer DDR5 hardware isn’t great as Tetras and others have said

You could get a used enterprise server with all the RAM you need that wouldn’t be fast but it would probably be fast enough (especially with a modern Nvidia AI focused GPU)
 
JollyJamma said:
You should rather consider a Threadripper or an older Xeon system.

Running all 4 DIMMs on consumer DDR5 hardware isn’t great as Tetras and others have said

You could get a used enterprise server with all the RAM you need that wouldn’t be fast but it would probably be fast enough (especially with a modern Nvidia AI focused GPU)
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Ok thanks, a bit more to the story, its going to be a work PC for the user and he wants to start doing stuff with Local A.I for his job. he asked for the intel processor over amd and said he wants 192gb of ram, we went down the workstation route but for some reason even after i told him to get a workstation he wants this route. He has a RTX 6000Ada ready to go in it and has about 2k / 2.5k to spend.
I don't do much with high end systems that's the reason for the post.

when someone said "Running all 4 DIMMs on consumer DDR5 hardware isn’t great as Tetras and others have said" are you just saying the system will work but the memory wont run as fast as it should.

We have been down the second user xeon market, the workstation market and he wants the above. i have put it to him the memory will run slower than it should.
 
Mason64 said:
Ok thanks, a bit more to the story, its going to be a work PC for the user and he wants to start doing stuff with Local A.I for his job. he asked for the intel processor over amd and said he wants 192gb of ram, we went down the workstation route but for some reason even after i told him to get a workstation he wants this route. He has a RTX 6000Ada ready to go in it and has about 2k / 2.5k to spend.
I don't do much with high end systems that's the reason for the post.

when someone said "Running all 4 DIMMs on consumer DDR5 hardware isn’t great as Tetras and others have said" are you just saying the system will work but the memory wont run as fast as it should.

We have been down the second user xeon market, the workstation market and he wants the above. i have put it to him the memory will run slower than it should.
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Yes, it won't run at very high speeds and it might be weird and give stability issues. DDR5 isn't really designed to work with 4 DIMMS populated (it can, it's just not great at it).

Don't you have an IT department to tell the user that they need to use pro-sumer hardware?

Running an LLM/AI system on a dedicated server solves a lot of issues and you can just remote into the system using a VPN which is safer for everyone. You can also lock it in a sever room.

When you get the user this system he wants and it doesn't work as well as he wants, what then?
 
Just thought of a good idea, open up Bluesky and send a message to Buildzoid and ask him for a motherboard and RAM recommendation for your use case.

Tell him the user wants this CPU. Buildzoid will probably answer because it's a niche use case and interesting. He'll also probably tell you to use a pro-sumer or server rig if you want to do it properly.
 
sorry to keep this post going,

why would a motherboards web site 4x 48gb works with a motherboard with ddr5 when it doesnt or does but not very stable?





From the Asus web site. More just want to get my head around it than anything.
 
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Mason64 said:
sorry to keep this post going,

why would a motherboards web site 4x 48gb works with a motherboard with ddr5 when it doesnt or does but not very stable?



From the Asus web site. More just want to get my head around it than anything.
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We’ll look at what speed it’s working at for one and two, it’s marketing.


DDR5 motherboards would be much better if they came with only 2 DIMM slots but Buildzoid points out that that would put a lot of buyers off since everyone is used to 4 DIMM slot motherboards.

If you want to run 4 DDR5 DIMM modules at even moderate speeds, you’re talking about a lot of time and effort to get it stable.
 
Mason64 said:
sorry to keep this post going,

why would a motherboards web site 4x 48gb works with a motherboard with ddr5 when it doesnt or does but not very stable?





From the Asus web site. More just want to get my head around it than anything.
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QVL is only telling you that it worked when they tested it with that specific combination, they can't test enough samples to guarantee you anything.

You'll notice that it is 5200 though, which I suggested being around the top speed you're likely to get.
 
Mason64 said:
why would a motherboards web site 4x 48gb works with a motherboard with ddr5 when it doesnt or does but not very stable?
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This is why you check the QVL. Notice that those kits works at 5200 - not 6000 - and are very specific. If you buy those exact DIMMs on that exact motherboard then you can be confident of getting 192 GB working at 5200 MTs.

But I'll echo everyone else: your user should be looking at Epyc or Threadripper or Xeon. And probably ECC RAM too. OCUK have a business side and they put together a fantastic solution for my brother's company.
 
Mason64 said:
its mainly for LLM. Ai stuff. the graphics card is a RTX 6000 Ada that i already have.
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If you're doing the LLM on CPU and memory then surely 192GB is not enough

Try 2.5 Terabytes of RAM instead :cry:

Pity I can't find the video of the person who did that but here's something

This guy is a noob but gives you an idea

This is very interesting where he thrashes his SSD due to lack of memory

 
I have built several systems using the Prime Z790-P Wifi with 192Gb of memory (That particular Corsair Part) with no issues. However they changed the BOM/Vers no shortly after and i could not get it running at the xmp profile. When i spoke to Asus they said that when they say it works in 4 module configuration then they will only support it with the memory set to AUTO not XMP (So it was runnin 4400Mhz/Loose Timings) as "It may be that due to it being a prime MB, the memory traces aren’t as robust as the TUF and ROG lines(And from personal experience the Proart Boards)" This was in relation to Z890 boards/support however I have had the same response in the past regarding Z790.

I would look at the Z890 platform with the 285K as that outperforms the 14900K by a little but a lot of the motherboards have CUDIMM support which has better compatibility/speed at higher capacity (Up to 256Gb)

Hope that is of some use.

EDIT: Oh just to add as well.. I have had much better luck getting 4x48Gb@XMP (5200Mhz) that i ever had running 4x32Gb which is an utter nightmare,
 
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ZXSpectrum said:
I have built several systems using the Prime Z790-P Wifi with 192Gb of memory (That particular Corsair Part) with no issues. However they changed the BOM/Vers no shortly after and i could not get it running at the xmp profile. When i spoke to Asus they said that when they say it works in 4 module configuration then they will only support it with the memory set to AUTO not XMP (So it was runnin 4400Mhz/Loose Timings) as "It may be that due to it being a prime MB, the memory traces aren’t as robust as the TUF and ROG lines(And from personal experience the Proart Boards)" This was in relation to Z890 boards/support however I have had the same response in the past regarding Z790.

I would look at the Z890 platform with the 285K as that outperforms the 14900K by a little but a lot of the motherboards have CUDIMM support which has better compatibility/speed at higher capacity (Up to 256Gb)

Hope that is of some use.

EDIT: Oh just to add as well.. I have had much better luck getting 4x48Gb@XMP (5200Mhz) that i ever had running 4x32Gb which is an utter nightmare,
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isnt 48gb guaranteed a die and thats why atleast from hynix, from memory. where as 32gb dimms can be a or m die and from what i understand for this kinda use case you want a die. brain aint working today but pretty sure i got that the right way around
 
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