AMD Ryzen memory support

[RemusM]

These are the memory configs & speeds guaranteed by AMD for their Ryzen 1XXX CPUs:
1866 MHz for 4 DIMMs in dual channel and dual rank.
2133 MHz for 4 DIMMs in dual channel and single rank.
2400 MHz for 2 DIMMs in dual channel and dual rank.
2666 MHz for 2 DIMMs in dual channel and single rank.
Anything above that is gambling.


Update 2020:

The max memory speed (guaranteed) for Ryzen 1XXX is 2666MHz.
The max memory speed (guaranteed) for Ryzen 2XXX is 2933MHz.
The max memory speed (guaranteed) for Ryzen 3XXX is 3200MHz.
But those speeds are guaranteed only in case of 2 single-rank modules.
In case of dual-rank modules or 4 memory modules everything is degraded with 266MHz (at least).
Of course, overclocking and overvolting combined with a bit of luck (high quality CPU) can lead to higher speeds.
But again, nothing is guaranteed.


Update 2023:

Ryzen 5XXX

Ryzen 7XXX

Ryzen 9XXX

 

[Alan J T]

Hello all,
I have a MSI B650-P Wifi (Bios 7D78v17) with a Ryzen 7 7800X3D and 2x16 GB of DDR5 (Corsair Vengeance CMK32GX5M2B6400C32 - 6400Mhz / CL32 / 1.4v) placed on the slots DIMMA2 and DIMMB2.

I had the A-XMP enabled, the frequency was at 6400 Mhz, but I had a lot of BSOD issues : after 45 min to play at Modern Warfare 2 (2022) : error code. Even without playing, on Windows : BSOD Error code like PAGE_FAULT_IN_NONPAGED_AREA or SYSTEM_THREAD_EXCEPTION_NOT_HANDLED...so I decreased the frequency at 6000 Mhz as you can see below and now it works perfectly fine.




My question is : according to the specifications of the MB, normally I can use my DDR5 with the 6400Mhz frequency. But unfortunately, for a reason I don't understand, it seems it become the system unstable. I would like to know if someone had the same behavior as me and if yes, there is any solution to use my memory at the maximum frequency without any unstability of the system?
Many thanks !

Run at 6000 as odds are that is all your CPU can cope with Memory speed is up to the CPU and what it can handle not may will boost over 6000 and be stable

 

[christophedubie154702da]

It's strange because I have a friend who have the MPG B650 CARBON WIFI and 32 Gb of RAM at 6400Mhz and we have the same exact CPU : Ryzen 7 7800X 3D and no issues at all. I was more thinking it could be related to the MB. Anyway, I will retry at 6400Mhz with the beta bios released the 7th of December.

 

[Alan J T]

we have the same exact CPU : Ryzen 7 7800X 3D and no issues at all

Not all CPUs even the same make will be identical each AMD CPU is only tested to see if it works at 5600

 

[sblantipodi]

with memory training enabled

***

Hi,
I have RAM latency of 74.6 ns.
Is it normal considering my rig shown below in my signature?
What could I do in my rig to improve this figure?
View attachment 178216View attachment 178217View attachment 178218View attachment 178219

that memory performance are really awful, I would consider it a disaster considering the high frequency you are running.
I think that running that frequency on AMD is not worth it.

this is a simple SK Hinyx m-die with 4 sticks (you know how difficult is to run 4 sticks)

 

[zerocoolriddle15b702ea]

with memory training enabled

***

Hi,
I have RAM latency of 74.6 ns.
Is it normal considering my rig shown below in my signature?
What could I do in my rig to improve this figure?
View attachment 178216View attachment 178217View attachment 178218View attachment 178219

Disable all crap sitting in your autostart, like rgb software etc.
And only main timings won't get you anywhere. That's like XMP and it will not give you any performance boost.

 

[lostking20015bf02e6]

x670e Carbon DDR5 QVL is up to 7800MT/s.
Can I expect, if I buy the supported F5-7800J3646H16GX2-TZ5RS, the EXPO/XMP 7800 will just work?

 

[lostking20015bf02e6]

Disable all crap sitting in your autostart, like rgb software etc.
And only main timings won't get you anywhere. That's like XMP and it will not give you any performance boost.

I notice the board in your screen shot is Asrock B650 LiveMixer.

 

[lostking20015bf02e6]

For your reference, 4x32GB setup. Hynix A-die is requried to get this speed.

 

[sblantipodi]

For your reference, 4x32GB setup. Hynix A-die is requried to get this speed.
View attachment 184727

That's insane on 128GB on 4 Sticks.
I would not consider it the norm. I think that you have an excellent IMC and some lucky sticks.

 

[zerocoolriddle15b702ea]

x670e Carbon DDR5 QVL is up to 7800MT/s.
Can I expect, if I buy the supported F5-7800J3646H16GX2-TZ5RS, the EXPO/XMP 7800 will just work?

Theoretically yes, but depends also on the kit and your imc.
All kits above 6400 are XMP only, therefore only tested on intel.

I notice the board in your screen shot is Asrock B650 LiveMixer.

Yes, i bought it while my carbon was dead. I could revive it using a usb programmer, but not sure if i stay on the asrock or switching back to msi.
I ordered an asrock b650m-hdv + 8600g today, testing which board will do highest mem clock possible.
The cheap asrock is a 1dpc board which has already shown ddr5-10000 doable, so interessting to see how the two 2dpc boards will compete.

 

[lostking20015bf02e6]

Theoretically yes, but depends also on the kit and your imc.
All kits above 6400 are XMP only, therefore only tested on intel.

I plan to buy a 2x24GB kit for my 2nd x670e Carbon, which should be even better than the 2x16GB kit from the QVL. My target is 8000.

Yes, i bought it while my carbon was dead. I could revive it using a usb programmer, but not sure if i stay on the asrock or switching back to msi.
I ordered an asrock b650m-hdv + 8600g today, testing which board will do highest mem clock possible.
The cheap asrock is a 1dpc board which has already shown ddr5-10000 doable, so interessting to see how the two 2dpc boards will compete.

We need msi to release x670e/B650 Unify-X.

 

[zerocoolriddle15b702ea]

Yeah, the overwhelming amount of 1dpc atx am5 boards is hilarious.

2x24gb is still singlerank, just watch out for a binning thats hynix.
6400 32-39-39
6800 34-46-46
Every kit 7200+
And don't expect 8000 to work fine.
Nearly every 2dpc board struggles to get 8000 stable, just a few lucky guys managed to find a good hardware combo.
And even if it runs, tuned 6400 1:1 will be faster in nearly any scenario. Maybe AMD will release another magic agesa that gives us 8000+, which is still locked on multiplier, and we are finally able to take advantage from 2:1.

 

[lostking20015bf02e6]

And even if it runs, tuned 6400 1:1 will be faster in nearly any scenario.

Last time I checked, my 7900 non-x chip couldn’t do stable 6400. The same chip can do 7800 stable with Hynix-a die, just not 8000.

 

[redspider.victo14ed02d1]

Hello everyone, I have the following question
MSI X670E Carbon Wi-Fi
AMD Ryzen 9 7950X3D
the specification says that the motherboard supports up to 256 GB of memory, but in the list of supported memory there are cards of less than 48 GB,
is there any data or maybe someone checked 64gb? I plan to use 4x
Micron DDR5-4800 65536 MB
Samsung DDR5-4800 65536 МВ PC5-38400 ECC Registered

I will be grateful for any answer that will help.

 

[RemusM]

Hello everyone, I have the following question
MSI X670E Carbon Wi-Fi
AMD Ryzen 9 7950X3D
the specification says that the motherboard supports up to 256 GB of memory, but in the list of supported memory there are cards of less than 48 GB,
is there any data or maybe someone checked 64gb? I plan to use 4x

There are several Micron and Hynix 32Gbit ICs (x16 = 64GB per module) under the sampling phase (betatesting if you like ), so they will be available soon for mass production.
The native speeds are in the 4800-5600 range.
Anyway, with 256GB memory and the current AMD CPUs, don't expect speeds above 3600-4400.
You need to be patient ...

 

[redspider.victo14ed02d1]

There are several Micron and Hynix 32Gbit ICs (x16 = 64GB per module) under the sampling phase (betatesting if you like ), so they will be available soon for mass production.
The native speeds are in the 4800-5600 range.
Anyway, with 256GB memory and the current AMD CPUs, don't expect speeds above 3600-4400.
You need to be patient ...

thanks for the answer

The 64GB modules are already available for sale are these currently supported in the current BIOS? Or the support for these modules is to be implemented in future BIOS revisions?

I understand about memory speed, but it's not the most important thing in a this PC, so it will be used for rendering

 

[RemusM]

The 64GB modules are already available for sale

No, they are not.
Again, you need to be patient.
https://www.msi.com/Motherboard/MPG-X670E-CARBON-WIFI/Specification
Supports non-ECC, un-buffered memory