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

 

[RemusM]

According to the memory speed chart with 4 dual channel ram slots filled witj first ranked dimms I should only get a speed of 2133mhz.
Yet with my four 8GB dimms I was able to get to 2400mhz quite easily on bios 1.27. When the bios is completely optimized I expect 2666mhz memory speed.

Those are the speeds guaranteed by AMD using the stock settings.
Depending on the quality of your memory modules and CPU, you can reach higher speeds.
Also, increasing the voltages and/or relaxing the timings you can reach higher speeds.

 

[jellewolters]

http://www.guru3d.com/news-story/msi-enables-a-xmp-for-better-ryzen-ddr4-perf-also-adds-new-models.html

 

[mfeinberg01]

Statistics alone can be misleading.

If one year 1 person gets the flu, and the next its 2 that is a massive 100% jump!

Sure, 10% seems significant but *most* users will not notice the difference between 100 FPS and 90 FPS as most monitors are still 60 Hz. Yes, I know about 144 Hz monitors, but even then *most* users won't really notice a difference. Also, those benchmarks that show that much of a difference are at lower resolutions in order to exaggerate deltas. That gap shrinks significantly at higher resolutions.

So the real-world impact is minimal.

 

[mfeinberg01]

https://www.overclock3d.net/news/cpu_mainboard/amd_has_reportedly_released_new_agesa_microcode_for_ryzen/1

 

[sofianebey]

On Corsair LPX 3000MHz (Micron) (CMK8GX4M2B3000C15) with bios 1.21 i can get 2666MHz by putting voltage at 1.35 and clock at 2666MHz. From now on i cant pass this clock speed.

Cpu: 1700
MB: B350 Tomahawk
Ram: Corsair LPX 3000MHz 8Gb

 

[jeffzac92]

Guys just have patience until a BIOS ver releases that allows 3200mhz across all brands.  You're fine with 2667, heck even 2400mhz until then.  As long as memtest86 returns with zero errors on a pass or 5 or 10, then you're set.  At this point, it's beating a dead horse posting about RAM not running at advertised speeds with MSI.  You've got 1 of 3 options.  

1) Keep replacing RAM until you give up/get lucky?
2) Get a new MOBO either x370, or another brand (ASUS, GA, ASROCK)
3) Go intel?  

Ryzen benefits from RAM speeds more than any processor released in the past decade; however, 2667mhz is grand for roughly 85-90% of us users.  Patience is key.

 

[dragianx]

I am currently running corsair LED 3200 (16GBx2 kit) on my X370 titanium setup with ryzen 1800x and is is auto OC at 2666 with no issue.  When i go higher without tuning voltages it pretty much needs a CMOS reset.  My bigger concern right now is that I see that there is a BIOS update available since my BIOS was flashed on 2/22 (just bought it today) and the MSI website says "file not found" when i attempt to download the bios update.  Any idea what's up with that?  Also I am running everything else pretty stock but I dont want to play with OC and running processor full speed until I get a bios update.

 

[mfeinberg01]

I am currently running corsair LED 3200 (16GBx2 kit) on my X370 titanium setup with ryzen 1800x and is is auto OC at 2666 with no issue.  When i go higher without tuning voltages it pretty much needs a CMOS reset.  My bigger concern right now is that I see that there is a BIOS update available since my BIOS was flashed on 2/22 (just bought it today) and the MSI website says "file not found" when i attempt to download the bios update.  Any idea what's up with that?  Also I am running everything else pretty stock but I dont want to play with OC and running processor full speed until I get a bios update.

The mods have a sticky post in another thread with the latest BETA BIOS releases for all AM4 motherboards. Have you tried looking there and downloading from their link?

Also, it appears AMD has released some updated code to address memory compatibility issues. I doubt it is the "final fix", and there are no reports yet on it's impact as it has yet to be incorporated into any BIOS updates from any manufacturer, but it should mean an update should be coming soon with (hopefully) noticeable improvements in memory compatibility and maybe some improvements in clock speed support.

 

[Riptide]

I flashed my BIOS to 1.10 release today. This is a MSI Tomahawk. There is a new feature in the BIOS on the 1.10 release A-XMP. I set it to that and the system rebooted with my modules running at PC3200 14-14-14 timings 1.35v. This is a gskill trident Z 2x8GB pc3200 cl14 set.

 

[erik@utmail.net]

Hey.
I got the Tomahawk 350B and the Ryzen 1800x and Corsair Vengeance LPX DDR4 DIMM PC26400/3300MHz CL16 4x4GB.
It's automatically set to 2300 Mhz in BIOS, and if I try to set it to 3200, I have to reset BIOS for the computer to boot. (Like otehrs have mentioned here.)

I have not yet updated to the 1.1 version of BIOS.

Anybody knows what would be the best BIOS settings for my setup with the current BIOS (1.1)?

Also, is this mainly a SW issue which may be solved in future BIOS versions, or is it HW related, meaning I'm stuck at lower hertz?

(I knew there was a high change I wouldn't get max hertz when I bought this and it's not a big deal, but my HW knowledge is limited and I'd rather ask someone who knows than mess around and fail alot.)

 

[Nichrome]

Also, is this mainly a SW issue which may be solved in future BIOS versions, or is it HW related, meaning I'm stuck at lower hertz?

It's a SW issue (BIOS), but both MSI and AMD needs time to fix it.
Intel had similar issues with their first chipset based on DDR4.

 

[Riptide]

Well shoot.  System will POST fine with A-XMP turned on and all the timings, voltage, and clocks are set OK.

The system rebooted from a bugcheck while I was at work this AM.  

Apparently there is work yet to be done on stability/compatibility.

1.1 Release BIOS - B350 Tomahawk
GSkill trident Z PC3200 CL14 2x8GB

 

[Riptide]

Need to revise the situation.  Ran memtest for almost two hours and had no errors.  Not entirely sure it is the memory that produced the bugcheck.  It may still have something to do with the 1.1 BIOS however I can't prove it.  What I can say is that nothing else on the system changed but that BIOS (from 1.0->1.1) and the A-XMP setting for the RAM.  Ran weeks without a bugcheck then suddenly produced one 24 hours after the change was made.

Difficult to draw conclusions.  I already cleared event viewer and did not analyze the dump file with the MS debugger.  So that ship has sailed.  Continuing to test..

 

[reyson91]

I am getting B350 TOMAHAWK and was looking at ram support list, I saw  that this ram is 3600 but will work at 3200, while I found this that is standard is 3200 mhz (like the product code is similar just the difference in their frequency), so my question is will the 3200 mhz ram still work on my mobo? Its a bit cheaper and I dont see any need for me to go and get 3600 mhz kind.

 

[AvengerUK]

Hi All,

(X370 Pro Carbon)

Using Corsair 3000Mhz C15 in my board (2x 8GB) - CMD16GX4M2B3000C15 - A-XMP won't post for 2993 - the old loop until you reset.

I can manually run 2666 - which is what I'm currently on.

I'm guessing a bios update is called for to improve this - but, is there anything I can try in the mean time? e.g. currently on Auto NB voltage, does raising this help? (not sure what the limits are though)

Cheers!

 

[darkhawk]

Hi All,

(X370 Pro Carbon)

Using Corsair 3000Mhz C15 in my board (2x 8GB) - CMD16GX4M2B3000C15 - A-XMP won't post for 2993 - the old loop until you reset.

I can manually run 2666 - which is what I'm currently on.

I'm guessing a bios update is called for to improve this - but, is there anything I can try in the mean time? e.g. currently on Auto NB voltage, does raising this help? (not sure what the limits are though)

Cheers!

While this is a thread on memory, please try and make your own thread for tweaking. It's much easier to reply in separate thread and not get confused.

 

[rindman]

Not really working with my Corsair LPX 3200mhz CL16 2x8Gb ( Hynix Single Ranked ), it's only stable at 2133mhz with the XMP's timings spec ... Even the JEDEC doesn't pass.

 

[Nichrome]

Not really working with my Corsair LPX 3200mhz CL16 2x8Gb ( Hynix Single Ranked ), it's only stable at 2133mhz with the XMP's timings spec ... Even the JEDEC doesn't pass.

Can you provide photo of the sticker on the RAM?

 

[rindman]

Sure, here there are.

Ok it was meant for Intel plateform, but atm we don't have AMD's Radeon DDR4 with "awesome AMP" profile.

So MSI, deal with it on Intel's XMP

 

[flugger1975]

I have the MSI B350 Tomahawk(bios 1.1) whit the R7 1700 on it.
And I`m running my memmory at 2933MHz.
I got the Corsair Vengeance LED DDR4 3200MHz 16GB (CMU16GX4M2C3200C16R)
And my system is running smooth.