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

 

[Nichrome]

My 9800X3D can't even get, 5600Mhz at CL40 without RAM errors in OCCT.
Is this normal, or is it a CPU defect?
I'm sending in the Mobo and CPU anyway because CPU telemetry keeps on freezing, and I'm wondering if I should inform the store about the CPU issue too and get that tested as well.

Could be either or both. Tell the store about the CPU too and they'll figure it out, maybe.

 

[xrodne152202d4]

My 9800X3D can't even get, 5600Mhz at CL40 without RAM errors in OCCT.
Is this normal, or is it a CPU defect?
I'm sending in the Mobo and CPU anyway because CPU telemetry keeps on freezing, and I'm wondering if I should inform the store about the CPU issue too and get that tested as well.

Its combination, depend on CPU, motherboard quality, specific memory and CPU memory controller.

Whats your memory module size? CL40 is probably micron chips, CL26-32 is hynix and should run better.
Also brand is important, Corsair seems to be more problematic than for example GSKIL
Also is your memory single or dualrank? Single rank is anything up to 24GB capacity per module, 32/48/64GB modules are all dualrank.
Single rank should be running 6000 pretty much on anything and with some effort, could run also those 7000-8000 modules.
Dualrank could run up 6400 with majority limited to 6000 some 6200 and few hitting 6400, but this highl;y depend on CPU amd motherboard quality.

Single rank you can also run with 4 dims with dualrank its rare to work with higher MT/s speeds.

I am running 2x48GB 6000MT/s CL28 GSKILL Trident Z5 Royal Neo on x870e Godlike and 9800x3d with easy.
Also 2x32GB 6000MT/s CL30 Adata XPG did run easily in same motherboard, both just default EXPO1 profile.

Memory tested on 6400 MT/s, internal profile 6400 CL32-40-*

 

[CuNi]

Its combination, depend on CPU, motherboard quality, specific memory and CPU memory controller.

Whats your memory module size? CL40 is probably micron chips, CL26-32 is hynix and should run better.
Also brand is important, Corsair seems to be more problematic than for example GSKIL
Also is your memory single or dualrank? Single rank is anything up to 24GB capacity per module, 32/48/64GB modules are all dualrank.
Single rank should be running 6000 pretty much on anything and with some effort, could run also those 7000-8000 modules.
Dualrank could run up 6400 with majority limited to 6000 some 6200 and few hitting 6400, but this highl;y depend on CPU amd motherboard quality.

Single rank you can also run with 4 dims with dualrank its rare to work with higher MT/s speeds.

I am running 2x48GB 6000MT/s CL28 GSKILL Trident Z5 Royal Neo on x870e Godlike and 9800x3d with easy.
Also 2x32GB 6000MT/s CL30 Adata XPG did run easily in same motherboard, both just default EXPO1 profile.

View attachment 201477
Memory tested on 6400 MT/s, internal profile 6400 CL32-40-*
View attachment 201514

It's Patriot 64GB cl32 6400Mhz RAM, but like I said, it doesn't even run at 5600cl40 without errors.
Afaik the ICs are from SK Hynix on those modules.

I RMAd the cpu and motherboard since I had telemetry freeze with high cpu usage. Maybe the board had an issue which also caused the RAM problems.
I send them a mail about the timings too and asked them to test for it as well. Let's see what happens. I am not sure what I want more to be broken. The CPU to get another chance to gamble for a good IMC or for the board to be borked.

I'll post a update once I have the parts back in a few weeks.

 

[Mugsy]

Are 1.3v vsoc and 1.45v vdimm meant to last? These are default xmp for corsair 64gb 6800 32-40-40-96. And several hundreds of 9xxx cpus died because of high vsoc

 

[xrodne152202d4]

1.3v SOC on Ryzen 9000 is maximum recommended voltage by AMD. ofcourse lowe is better.

 

[Martin.v.r]

1.3v SOC on Ryzen 9000 is maximum recommended voltage by AMD. ofcourse lowe is better.

1.3 is to high

if we say that VSOC is 1.25v then VDDG CCD and IOD should be 0.50 lower, and VDDP should be 0.50 lower than VDDG setup

??
vsoc 1.25
VDDG
CCD 1.20
IOD 1.20
VPPD 1.15

vsoc 1.20
VDDG
CCD 1.15
IOD 1.15
VPPD 1.10

min here at 7800MHZ
vsoc 1.210
VDDG
CCD 1.16
IOD 1.16
VPPD 1.20

auto setup is to low

 

[artur.aragao@outlook.com.br]

So.
I've always left the BIOS default values to work for these cases. I've never had any problems.

Now, if this is the limit, MSI should fix it to keep some minimally safe margins of work.

Can someone from MSI tell us about this?

 

[artur.aragao@outlook.com.br]

Is there any post that references this information you are mentioning here?

I need to check this out. Not that I don't believe you, but I need to have my own perception.

 

[artur.aragao@outlook.com.br]

So. There is an inconsistency here.

AMD clearly already limits the limit value to 1.3V on the SOC.

And lower profiles like 1.2V are not recommended when using faster memories and/or overclocking. So, since my memory profile is in OC with EXPO, the configuration is more than coherent.

I saw a lot of consistency on this subject here.

https://www.techpowerup.com/forums/...ries-zen-5-memory-discussion-oc.325935/page-2>

I appreciate the recommendations, but I am satisfied and cold with my configuration in AUTO.

I realized that situations vary a lot and there are particularities.

 

[Martin.v.r]

So. There is an inconsistency here.

AMD clearly already limits the limit value to 1.3V on the SOC.

And lower profiles like 1.2V are not recommended when using faster memories and/or overclocking. So, since my memory profile is in OC with EXPO, the configuration is more than coherent.

I saw a lot of consistency on this subject here.

https://www.techpowerup.com/forums/...ries-zen-5-memory-discussion-oc.325935/page-2>

I appreciate the recommendations, but I am satisfied and cold with my configuration in AUTO.

I realized that situations vary a lot and there are particularities.

If all voltages are really correct, then you can get a lot out of it. Yes, it takes time. I have spent almost 6 hours out of 1 month fiddling with/trimming the BIOS on this motherboard. I have been through all the different BIOS versions for this motherboard.

EXPO/try it is fin
but they still have poor performance compared to those who know how to set subtiming for optimal performance

I have a large water setup, so I have room for quite a bit of overclocking, and G.Skill has a maximum limit of 50°C, so I have a fan over my memory, which is around 32/34°C.