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What did you have to do to get 128GB ram working on Zen3 CPU?

What did you have to do to get 128GB ram working on Ryzen Zen3 CPU?

  • Nothing, it worked just fine.

    Votes: 7 58.3%
  • Had to reduce frequency.

    Votes: 3 25.0%
  • Had to adjust timings.

    Votes: 0 0.0%
  • Had to adjust voltages.

    Votes: 1 8.3%
  • Had to reduce infinity fabric frequency.

    Votes: 0 0.0%
  • Didn't work / Wasn't reliable.

    Votes: 1 8.3%
  • Still trying to figure it out

    Votes: 1 8.3%

  • Total voters
    12
  • Poll closed .
Thank for this fast answer :)

The problem is I have performance issues... cpu seems saturated by pics sometimes, resulting in rollback in game for players.
I think cpu is enough strong to supports, but think the ram is too long.
It's about 14 ark servers.

Here, I saw working 3200mhz with 128gb :

Ok if I can't reach 3600, but 2900 or 3000 must be possible with stability no ?
3200 if your lucky I guess. Per my motherboard 2666 is spec but my issue wasn't frequency so much as the idle time problem I was having at any frequency <=3200. I've finally go around to swapping my CPU back in May (due to uncertainty if the CPU was damaged from a prior event) so just waiting for the latest BIOS to come out of BETA and I will be trying again (unless I get some time in between) to see if 128GB @3200 idle time issue is resolved or not. I got 3600 on the same kit, with some helpful example at 64GB, so I know there is some headroom in the kit but 128G at >3200 for daily I don't think is likely especially with ECC which is not binned for overclocking.
 
Hello
Sorry for my english, I'm french :)

I search to understand why my ownbuild server (5950x, 4*32GB patriot 3600c18, on a X570-A pro) not work when activating xmp.
Server reboot 3 times, and disable XMP. Ram runs at 2667Mhz so...

As I found, I maybe understand there is a system of ranks, that plays on the maximum frequency.

How I can use a better frequency on this config ?

Last time I touch to overclock, it was more simple... 3500+ and q6600 : only fsb and ratio 15 years ago.

Thank in advance if you can help or redirect me to an ultra assited tutorial :s
Update to the latest BIOS, check the SoC voltage in Zentimings
You'll likely need at least 1.15v for 4x dual ranks, maybe as high as 1.20v

SoC voltage is for the link between the various parts of the CPU as a whole, primarily the IO die where the memory controller lives

Because that IOdie has the memory controller, USB ports, SATA ports, and some PCI-E lanes instability from too low a voltage can show up in a bunch of different ways, usually when the system moves from idle to load rapidly - like the small bursts of loading opening videos in a web browser, the voltage dips before the board can compensate and seemingly unrelated symptoms occur depending on which component crashed or reset like the infamous USB dropouts
 
Update to the latest BIOS, check the SoC voltage in Zentimings

You'll likely need at least 1.15v for 4x dual ranks, maybe as high as 1.20v
I can do 1.1v SoC for 4x dual ranks but those ain't 32GB dimms. Memory controller most likely just isn't gonna do with that capacity.
 
Thank for this fast answer :)

The problem is I have performance issues... cpu seems saturated by pics sometimes, resulting in rollback in game for players.
I think cpu is enough strong to supports, but think the ram is too long.
It's about 14 ark servers.

Here, I saw working 3200mhz with 128gb :

Ok if I can't reach 3600, but 2900 or 3000 must be possible with stability no ?
Post a Zentimings screenshot and a full-screen HWinfo sensors page screenshot while cinebench R23 is running (at least the 10 minute test, before it ends)

between those, we'll find what's going on

I can do 1.1v SoC for 4x dual ranks but those ain't 32GB dimms. Memory controller most likely just isn't gonna do with that capacity.
I mean, i can run 4xDR at 3200 on these CPU's at the 1.09v default on the new BIOSes as well, but 3600? no chance.
CPU type, ranks, speed - it's a combo of all three, none are important alone.

Some boards are less honest than others, it's as simple as that.
As the most obvious example some asus boards send 0.05v higher than the user sets, just like gigabyte does to DDR4 vDIMM voltage

These values vary between boards, and recently it's been getting attention with BIOS updates where the new defaults are in a lot better ranges for most users (0.95v to 1.09v for vSOC, on my x370 aorus)
Other times it's a rare case where it may be one of the secondary voltages like VDDGIO

On my x570 Asus, 1.15v drops to 1.13v - but note the higher default VDDGIO on this one, as soon as i raise the IF above 1800 (for 3600MT/s on the RAM) it automatically boosts some voltages
1688269299312.png


Compared to my Aorus B550, which boosts vdimm higher than user set, but doesnt raise vddg IOD or CLDO VDDP at all - shockingly (sarcasm), this board doesnt clock the IF quite as high on automatic voltages (I paired it with single rank memory, so i didn't bother raising them)
This boards set to 1.125v, which reads the same as the asus on 1.15v

ZenTimings_Screenshot.png

This says VDIMM is 1.35v, yet the BIOS and hwinfo show 1.42v - what's set in the BIOS and reported to the CPU, is not what's actually sent


The one thing i cant do is probe the real voltages like the techtubers did with the AM5 scandals, to see how accurate those readings are - the big scandal was that boards were over-volting after the sensors so users weren't aware of it, and thats why CPU's run hotter in some boards, overclock better in some, etc.
(This is why it went wrong so fast - because the boards relied on those sensors to set accurate voltages, so the asus ones made some horrible mistakes if the system crashed - oops no reading, better throw more voltage!)
 
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I feel kinda lucky my old 5950X did 4xDR 3600 at 0.98 SoC, but they're 16 GB sticks. Its new owner should be pretty happy :p

Memory overclocking on Ryzen is simply fun compared to the wretch that's DDR5 on 13th gen Intel
 
I feel kinda lucky my old 5950X did 4xDR 3600 at 0.98 SoC, but they're 16 GB sticks. Its new owner should be pretty happy :p

Memory overclocking on Ryzen is simply fun compared to the wretch that's DDR5 on 13th gen Intel
If i had to guess i'd say you had one of the higher end asus or aorus boards that overvolted higher than it read
I suppose MSI strarted that whole trend too, but they got in so much shit over their poor VRM's no one really investigated them
 
If i had to guess i'd say you had one of the higher end asus or aorus boards that overvolted higher than it read
I suppose MSI strarted that whole trend too, but they got in so much shit over their poor VRM's no one really investigated them

Strix B550-E, I'd say tier A board I guess o_O

But it treated me well for as long as I've had it, all the issues I ran into like poor memory training, USB dropouts, fTPM stuttering, EDC bug etc were AMD's fault and AGESA updates eventually fixed them all. Even if this latter was way too late for me to enjoy it :(
 
I feel kinda lucky my old 5950X did 4xDR 3600 at 0.98 SoC, but they're 16 GB sticks. Its new owner should be pretty happy :p

Memory overclocking on Ryzen is simply fun compared to the wretch that's DDR5 on 13th gen Intel
That's sounds pretty awesome. I couldn't do that with my 4xDR 16GB sticks.
 
Strix B550-E, I'd say tier A board I guess o_O

But it treated me well for as long as I've had it, all the issues I ran into like poor memory training, USB dropouts, fTPM stuttering, EDC bug etc were AMD's fault and AGESA updates eventually fixed them all. Even if this latter was way too late for me to enjoy it :(
I mean, it's not like asus made the news lately for overvolting on ryzen or anything
You'd have had high SoC out of the box for sure on that - keep in mind that B550 was the final chipset, and it started with those newer BIOS and voltages out of the box - and some board makers (asus, giga and MSI in order of guilt) added offsets to boost above what the BIOS asked for as well (so when AMD raised the defaults, their offsets raised them further)

That said, unlike AM5 you would have been in a safe range - somewhere between 1.0 and 1.10v
 
Just an update in case anyone might find this helpful.
I was able to get 128GB @ DDR4-3200 working by switching out the Nemix to these Micron modules.

So far running for a week now, no problems, no reboots.

1700408902004.png
 
The configuration is 4x32GB (2 x 64GB kits, each Dual Rank) Also I can verify they are all using the same IC's (physically inspecting the module) and timings in UEFI/BIOS.

Return and replace with a full 4 stick kit. Running two separate kits is just asking for trouble with this RAM configuration.
 
Just an update in case anyone might find this helpful.
I was able to get 128GB @ DDR4-3200 working by switching out the Nemix to these Micron modules.

So far running for a week now, no problems, no reboots.

View attachment 322253
Congrats with your kit - personally I would like something with the ability to run better timings and speed, but I dont use my 5950x for produktivity
1700413152239.png

I would like to see something like this with 4x32GB but I do not know if there is any samsung kits or equal that can do this on AMD
 
Return and replace with a full 4 stick kit. Running two separate kits is just asking for trouble with this RAM configuration.
Nah. He's lucky with it running at a low SoC, but beyond that it's piss easy to get 4x dual rank sticks working on AM4.

The only difficulty with it is either manually adjusting the voltages or lowering speeds til it's stable - people use faulty logic far too often
 
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