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

[PunishedSnake]

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.

 

[nem..]

some one post this in
http://www.gigabyte.com/Motherboard/GA-Z270-Gaming-K3-rev-10#sp

GA-Z270-Gaming K3

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

GA-Z270-Gaming K3

i do guess than intel platform have highter support of ram than ryzen , but its not , ryzen have highter native support for run 2667mhz without OC .

 

[Black Indica]

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.

http://valid.x86.fr/3rvit6
idk man
im pretty much a yuppy newcomer when it comes to OCing
and memory timings and clock speed adjustments were pretty easy to figure out.
just had to figure out what chip/soc really need to be OCed to achieve high memory clocks
then going back in and tightening timings and re-benching...

 

[Super XP]

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.

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. https://www.techpowerup.com/231518/...-ddr4-memory-support-and-upcoming-am4-updates

 

[anubis44]

Nice!

My Z sticks are capped at 3200 c14 right now, but could easily do higher with looser timings.

OK, please tell me, what motherboard (and bios, too, if you can) are you using, and I'm assuming you mean G.Skill Trident Z DDR4-3200 CL14 memory, correct? I'm asking because I have a Gigabyte AX370 Gaming 5 motherboard, running the latest (as of today) F5d (dated 03/14/2017), and I have been unable to get either Corsair Vengeance DDR4-3200 CL16 (2x16GB sticks) or G.Skill Trident Z DDR4-3200 CL16 (2x8GB sticks) to run at anything higher than 2666MHz, no matter what voltage, timings, etc. I've used. (AIDA identified the G.Skill ram as Samsung, just in case that's useful to anyone).

Thanks!

 

[phanbuey]

OK, please tell me, what motherboard (and bios, too, if you can) are you using, and I'm assuming you mean G.Skill Trident Z DDR4-3200 CL14 memory, correct? I'm asking because I have a Gigabyte AX370 Gaming 5 motherboard, running the latest (as of today) F5d (dated 03/14/2017), and I have been unable to get either Corsair Vengeance DDR4-3200 CL16 (2x16GB sticks) or G.Skill Trident Z DDR4-3200 CL16 (2x8GB sticks) to run at anything higher than 2666MHz, no matter what voltage, timings, etc. I've used. (AIDA identified the G.Skill ram as Samsung, just in case that's useful to anyone).

Thanks!

Im using the Gskill TridentZ 3200 cl-15 2x8GB sticks on the ASUS X370 prime 0504 bios. Black and white heatspreaders (not sure if this makes a difference) 1.37V memvoltage .975 SOC voltage... chip sitting @4.0 ghz 1.45v

 

[chase jones]

G.Skill Trident Z (F4-3200C16D-16GTZR Is also Hynix