Wednesday, March 15th 2017

AMD Shares Details on Ryzen DDR4 Memory Support and Upcoming AM4 Updates

In a blog post titled "Tips for Building a Better AMD Ryzen System", AMD has shed some light on the current memory support quirks with their Ryzen CPUs. First interesting detail: Ryzen processors do not offer memory dividers for DDR4-3000 or DDR4-3400. As such, AMD recommends that users looking to use higher memory speeds with their Ryzen processors instead look towards 3200 or 3500 MT/s. Due to Ryzen's preferences when it comes to memory, AMD also recommends that users pay particular attention to motherboard vendor's memory QVL lists for speeds greater than DDR4-2667.

Remember RAM importance on Ryzen processors' performance, which is given newfound importance in alleviating possible bottlenecks related to AMD's Data Fabric, the interconnect technology being used to communicate between different CCX's in AMD's 8-core Ryzen 7 and upcoming 6-core Ryzen 5 processors. Higher data rate of your memory subsystem should better help Ryzen's inter-core communication, and thus allow for higher performance in multiple scenarios, more so than with any other current CPU architecture.
In this regard, AMD seems to have obtained good internal results with some 2933, 3200, and 3500 MT/s rated memory configurations, namely 16GB kits based on Samsung "B-die" memory chips. Potential kits that AMD has tested to pair well with Ryzen include Geil EVO X (GEX416GB3200C16DC [16-16-16-36 @ 1.35v]); G.Skill Trident Z (F4-3200C16D-16GTZR [16-18-18-36 @ 1.35v]) and the Corsair CMK16GX4M2B3200C16 (VERSION 5.39 [16-18-18-36 @ 1.35v]).

AMD also stressed incoming updates in regards to memory support of its AM4 platform, with updates being pushed to motherboard makers this May, which should enable support for memory at speeds "higher than the current DDR4-3200 limit without refclk adjustments." For reference, see below memory support tables according to memory speed, rank, and quantities supported by Ryzen processors.
Source: Community.amd.com
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31 Comments on AMD Shares Details on Ryzen DDR4 Memory Support and Upcoming AM4 Updates

#1
theGryphon
Really? NOW, they say 3000 and 3400 is not supported?? Should've been the first thing Lisa Su said after introducing Ryzen at the event!
Posted on Reply
#2
nemesis.ie
May? That seems like a long time to get this out. I hope this doesn't mean a hardware revision to either board or chips or there will be a lot of upset folks, myself included.

I hope it's just a microcode/EFI thng. Sooner would be better. ;)
Posted on Reply
#3
TheLostSwede
theGryphon, post: 3620352, member: 52425"
Really? NOW, they say 3000 and 3400 is not supported?? Should've been the first thing Lisa Su said after introducing Ryzen at the event!
It should've been very very very clear from the motherboard memory specs that they posted from day one.
Posted on Reply
#4
Imsochobo
TheLostSwede, post: 3620371, member: 3382"
It should've been very very very clear from the motherboard memory specs that they posted from day one.
This was posted on day 1 for those who wanted to READ!
for those who trusted ASUS read 3400 mhz and expected it to work.

Motherboards may run higher speeds, but it doesn't mean it's supported, Do you think Intel Officially supports crazy high clock memory?
NO!

2400 mhz max supported on I7 LGA1156
Posted on Reply
#5
TheLostSwede
Imsochobo, post: 3620378, member: 66457"
This was posted on day 1 for those who wanted to READ!
for those who trusted ASUS read 3400 mhz and expected it to work.

Motherboards may run higher speeds, but it doesn't mean it's supported, Do you think Intel Officially supports crazy high clock memory?
NO!

2400 mhz max supported on I7 LGA1156
I only saw 2933 and 3200MHz, no board maker posted 3400MHz OC on their websites.
Looks like Asus has removed 2933MHz support on the Crosshair board though.
Posted on Reply
#6
Ferrum Master
TheLostSwede, post: 3620384, member: 3382"
I only saw 2933 and 3200MHz, no board maker posted 3400MHz OC on their websites.
Looks like Asus has removed 2933MHz support on the Crosshair board though.
Not the first time...

For example my Rampage Gene 2, it claims 2000MHz support for RAM. Yes it boots, does it work stable? Nada... I haven't got it stable with multiple modules too... 1800MHz is max stable... I had the same for other X58 boards too btw... tried many sticks that does work fine in X79 at 2400MHz, also four 1366 cpu's I have around.

It is just for records, existent multi in bios... like seeing 200FSB for a Pentium III board, I've booted only 185 once thou lol... the board has the feature... but no real life guarantees.

That's layf... just tag along.
Posted on Reply
#7
phanbuey
Nice!

My Z sticks are capped at 3200 c14 right now, but could easily do higher with looser timings.
Posted on Reply
#8
Chane
I'm still waiting on my Asrock ab350m pro4, but there Memory QVL does list both Corsair Vengeance 3000mhz and GSkill Trident Z 3000mhz kits noting that they will run at 2933mhz and have the additional option of overclocking them. http://www.asrock.com/MB/AMD/AB350M Pro4/index.asp#Memory

I'm okay with this, was about to ditch my corsair kit, until i read their page.
Posted on Reply
#9
Grings
The biggest problem with ram for ryzen is most memory companies stopped listing whether their sticks are single or dual sided a few years back
Posted on Reply
#10
mcraygsx
I am not that surprised at all. I was one of the early adopters of X99 platform and I know memory issues with Intel as well.
Posted on Reply
#11
nem..
https://www.techpowerup.com/231204/g-skill-announces-flare-x-series-and-fortis-series-ddr4-memory-for-amd-ryzen

[URL='https://www.techpowerup.com/231204/g-skill-announces-flare-x-series-and-fortis-series-ddr4-memory-for-amd-ryzen']G.SKILL Announces Flare X Series and FORTIS Series DDR4 Memory for AMD Ryzen


[/URL]
AMD-Tuned DDR4-3200MHz CL14 64GB(4x16GB)
Not needing to sacrifice frequency for capacity, G.SKILL's R&D team achieved an impressive overclock on a 64GB (4x16GB) kit to frequencies of DDR4-3200MHz at ultra-low timings of CL14-14-14-34. See below for a validation screenshot for the kit on the ASUS ROG Crosshair VI Hero motherboard and the AMD Ryzen 7 1700 processor:


AMD-Tuned DDR4-3466MHz CL16 16GB(2x8GB)
Further pushing the boundaries of 16GB (2x8GB) memory kits on the AM4 platform, G.SKILL tuned it to a blistering fast DDR4-3466MHz CL 16-16-16-36. Tested on the 8-core AMD Ryzen 7 1700 processor and ASUS ROG Crosshair VI Hero motherboard, this is the fastest G.SKILL memory kit that's been designed for AMD thus far. See below for the validation screenshot:
Posted on Reply
#12
Hood
Imsochobo, post: 3620378, member: 66457"
2400 mhz max supported on I7 LGA1156
No, official support is 1066/1333 MHz on Westmere CPUs/P55 chipset. But what do 8-year-old 1st generation Core sockets have to do with this argument?
Posted on Reply
#13
m1dg3t
I heard that one can manipulate the BCLK to help with mem clocking since the BIOSes are kinda flaky ATM, thought I heard going up to 107 is safe right now???

Can't wait to see what kinda #s we get once the BIOSes are sorted ;)
Posted on Reply
#14
FMinus
nem.., post: 3620730, member: 164231"
https://www.techpowerup.com/231204/g-skill-announces-flare-x-series-and-fortis-series-ddr4-memory-for-amd-ryzen

G.SKILL Announces Flare X Series and FORTIS Series DDR4 Memory for AMD Ryzen


AMD-Tuned DDR4-3200MHz CL14 64GB(4x16GB)
Not needing to sacrifice frequency for capacity, G.SKILL's R&D team achieved an impressive overclock on a 64GB (4x16GB) kit to frequencies of DDR4-3200MHz at ultra-low timings of CL14-14-14-34. See below for a validation screenshot for the kit on the ASUS ROG Crosshair VI Hero motherboard and the AMD Ryzen 7 1700 processor:


AMD-Tuned DDR4-3466MHz CL16 16GB(2x8GB)
Further pushing the boundaries of 16GB (2x8GB) memory kits on the AM4 platform, G.SKILL tuned it to a blistering fast DDR4-3466MHz CL 16-16-16-36. Tested on the 8-core AMD Ryzen 7 1700 processor and ASUS ROG Crosshair VI Hero motherboard, this is the fastest G.SKILL memory kit that's been designed for AMD thus far. See below for the validation screenshot:
3466 is only possible on motherboards with a clock generator, look at the BCLK that the Ryzen samples are running. Afaik, you can't push Ryzen base clock over 100MHz without an external clock generator. This is a bit too much for the average user to fiddle with. Seems they did the same with their 3200 sample, as people report the 3200 multiplier is "broken" on AMD platforms and actually you lose performance with the loose timing you get while running 3200 the "normal" way.

So yeah, external clock generator, and fiddling. A bit too much for your average user, even those who are somewhat enthusiastic and OC their CPUs, the RAM side of things might be too complicated for them.
Posted on Reply
#15
Melvis
Wait...so offically support in Dual channel is 2400? here i thought it was 2667....
Posted on Reply
#17
kn00tcn
why does the small screenshot open up a full one with a name on it? why dont you have a browser addon like fireshot?
Posted on Reply
#18
darkangel0504
GA-Z270-Gaming K3
  1. Support for DDR4 3866(O.C.) / 3800(O.C.) / 3733(O.C.) / 3666(O.C.) / 3600(O.C.) / 3466(O.C.) / 3400(O.C.) / 3333(O.C.) / 3300(O.C.) / 3200(O.C.) / 3000(O.C.) / 2800(O.C.) / 2666(O.C.) / 2400 / 2133 MHz memory modules
Posted on Reply
#19
Jism
Ferrum Master, post: 3620509, member: 90058"
Not the first time...

For example my Rampage Gene 2, it claims 2000MHz support for RAM. Yes it boots, does it work stable? Nada... I haven't got it stable with multiple modules too... 1800MHz is max stable... I had the same for other X58 boards too btw... tried many sticks that does work fine in X79 at 2400MHz, also four 1366 cpu's I have around.

It is just for records, existent multi in bios... like seeing 200FSB for a Pentium III board, I've booted only 185 once thou lol... the board has the feature... but no real life guarantees.

That's layf... just tag along.
The problem is your IMC in your CPU, not the motherboard. They offer enough electrical space to support 2000MHz DDR memory, but in the end your IMC should be able to support that memory or not.

The Vishera 8350 / 8320 and all comes with 1866MHz DDR3 support. In OC you can easily archieve DDR2400Mhz. In OC yes, it's always experimental and one result does not reflect the other.

The 200Mhz FSB is also in OC mode, and proberly requires extreme cooling and high voltage to archieve that. It's never a guarantee.
Posted on Reply
#21
mtcn77
Grings, post: 3620632, member: 32603"
The biggest problem with ram for ryzen is most memory companies stopped listing whether their sticks are single or dual sided a few years back
16GB dimms are safe, there aren't any single-sided 16GB dimms.
Posted on Reply
#23
Footman
Bit frustrated that my G Skill Ripjaws 3200 ram can only run at 3000 on the MSI Carbon Pro. Also frustrated that MSI have just the one bios for this board on their website!!! However my 1700 is humming away at 4.0ghz on all cores at 1.3875vcore and is performing like a champ with my media encoding. Also gaming at 2560x1440 is just as speedy as my last machine with a 4790K. I look forward to even better performance once the Microsoft and game developers start to optimize.
Just saying.
Posted on Reply
#24
ADHDGAMING
Imsochobo, post: 3620378, member: 66457"
This was posted on day 1 for those who wanted to READ!
for those who trusted ASUS read 3400 mhz and expected it to work.

Motherboards may run higher speeds, but it doesn't mean it's supported, Do you think Intel Officially supports crazy high clock memory?
NO!

2400 mhz max supported on I7 LGA1156
AMD def mentioned this B4 lol
Posted on Reply
#25
PunishedSnake
Raevenlord, post: 3620338, member: 166527"
In a blog post titled "Tips for Building a Better AMD Ryzen System", AMD has shed some light on the current memory support quirks with their Ryzen CPUs. First interesting detail: Ryzen processors do not offer memory dividers for DDR4-3000 or DDR4-3400. As such, AMD recommends that users looking to use higher memory speeds with their Ryzen processors instead look towards 3200 or 3500 MT/s. Due to Ryzen's preferences when it comes to memory, AMD also recommends that users pay particular attention to motherboard vendor's memory QVL lists for speeds greater than DDR4-2667.

Remember RAM importance on Ryzen processors' performance, which is given newfound importance in alleviating possible bottlenecks related to AMD's Data Fabric, the interconnect technology being used to communicate between different CCX's in AMD's 8-core Ryzen 7 and upcoming 6-core Ryzen 5 processors. Higher data rate of your memory subsystem should better help Ryzen's inter-core communication, and thus allow for higher performance in multiple scenarios, more so than with any other current CPU architecture.



[---]

In this regard, AMD seems to have obtained good internal results with some 2933, 3200, and 3500 MT/s rated memory configurations, namely 16GB kits based on Samsung "B-die" memory chips. Potential kits that AMD has tested to pair well with Ryzen include Geil EVO X (GEX416GB3200C16DC [16-16-16-36 @ 1.35v]); G.Skill Trident Z (F4-3200C16D-16GTZR [16-18-18-36 @ 1.35v]) and the Corsair CMK16GX4M2B3200C16 (VERSION 5.39 [16-18-18-36 @ 1.35v]).

AMD also stressed incoming updates in regards to memory support of its AM4 platform, with updates being pushed to motherboard makers this May, which should enable support for memory at speeds "higher than the current DDR4-3200 limit without refclk adjustments." For reference, see below memory support tables according to memory speed, rank, and quantities supported by Ryzen processors.



Source: Community.amd.com
Hey Raevenlord, just a heads up on an error in AMDs article and for anyone considering buying the recommended Corsair DIMMs, I've already posted this on AMDs blog:

The Corsair CMK16GX4M2B3200C16 VERSION 5.39 [16-18-18-36 @ 1.35v] is NOT a Samsung B-Die, it's SK Hynix and will NOT clock above 2666mhz on an Asus Crosshair VI Hero on not only my board but also a friend who bought the exact same setup, the CORSAIR CMK16GX4M2B3200C16 ver4.31 16-18-18-36 @ 1.35V however IS a Samsung B-Die and will behave as expected. Caveat Emptor.
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