ASRock Forums : Can't run 2 identical kits at XMP speed https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 08 Apr 2026 06:03:04 +0000 Sat, 07 Oct 2017 21:31:03 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=6275 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[Can't run 2 identical kits at XMP speed : datonyb wrote:duke can you...]]> https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37547&title=cant-run-2-identical-kits-at-xmp-speed#37547 Author: duke
Subject: 6275
Posted: 07 Oct 2017 at 9:31pm

Originally posted by datonyb datonyb wrote:

duke can you confirm you are running
8 sticks total 64gb in your board

just for reference as the 8 stick 128 kits seem to be having issues


Yes, I have 8 sticks of total 64GB RAM (I have 2 kits of these - F4-3200C14Q-32GF).

Edited by duke - 07 Oct 2017 at 9:38pm]]> Sat, 07 Oct 2017 21:31:03 +0000 https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37547&title=cant-run-2-identical-kits-at-xmp-speed#37547 <![CDATA[Can't run 2 identical kits at XMP speed : p.s. im having some time this...]]> https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37543&title=cant-run-2-identical-kits-at-xmp-speed#37543 Author: datonyb
Subject: 6275
Posted: 07 Oct 2017 at 8:40pm

p.s. im having some time this morning with my ram and its cold boot issue

so far fingers crossed ive made progress

i will update with my findings and see if i can help you get a little further
]]> Sat, 07 Oct 2017 20:40:35 +0000 https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37543&title=cant-run-2-identical-kits-at-xmp-speed#37543 <![CDATA[Can't run 2 identical kits at XMP speed : duke can you confirm you are running8...]]> https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37542&title=cant-run-2-identical-kits-at-xmp-speed#37542 Author: datonyb
Subject: 6275
Posted: 07 Oct 2017 at 8:38pm

duke can you confirm you are running
8 sticks total 64gb in your board

just for reference as the 8 stick 128 kits seem to be having issues
]]> Sat, 07 Oct 2017 20:38:50 +0000 https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37542&title=cant-run-2-identical-kits-at-xmp-speed#37542 <![CDATA[Can't run 2 identical kits at XMP speed : Fair enough, thanks a lot for...]]> https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37541&title=cant-run-2-identical-kits-at-xmp-speed#37541 Author: duke
Subject: 6275
Posted: 07 Oct 2017 at 8:15pm

Fair enough, thanks a lot for your input! I will remember to post here if I get better speeds on 8 dimms in the future.
]]> Sat, 07 Oct 2017 20:15:51 +0000 https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37541&title=cant-run-2-identical-kits-at-xmp-speed#37541 <![CDATA[Can't run 2 identical kits at XMP speed : 8 modules is really pushing the...]]> https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37540&title=cant-run-2-identical-kits-at-xmp-speed#37540 Author: Xaltar
Subject: 6275
Posted: 07 Oct 2017 at 6:51pm

8 modules is really pushing the IMC. The board is allocating twice the resources (and power) to get them to fire up. Honestly, I am impressed you managed 2933 on all 8. Now don't get me wrong, I am not saying you won't be able to go higher but you do have to bare in mind the lingering issues with AMD and memory. I suspect it will be a while before we see higher speeds (fully stable) on a fully populated X399 board.

I could be wrong here but I didn't find any evidence of anyone hitting 3600 on 8 dimms with the X399 platform. Admittedly my search was rather quick and dirty but I did look Tongue

I would imagine as the AGESA code matures for the X399 platform you will see better results. As it is you have already covered most of the tweaks I can think of to try. If you do succeed however, please drop in and let us know what worked for you Wink
]]> Sat, 07 Oct 2017 18:51:31 +0000 https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37540&title=cant-run-2-identical-kits-at-xmp-speed#37540 <![CDATA[Can't run 2 identical kits at XMP speed : Hi,Hopefully someone is able to...]]> https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37531&title=cant-run-2-identical-kits-at-xmp-speed#37531 Author: duke
Subject: 6275
Posted: 07 Oct 2017 at 9:13am

Hi,

Hopefully someone is able to help me with this issue. I just build myself a X399 system with a Threadripper 1950X CPU and a X399 Taichi motherboard. I'm extremely satisfied but I've got a problem with my RAM.

I bought some quite expensive 2 x identical kits G.Skill F4-3200C14Q-32GFX - 3200Mhz, CL14, single rank, Samsung B-die. I though I would get at least these advertised speeds. Well, it turned out a bit differently. I can boot fine at XMP speeds only when just one kit (4 sticks) is installed. If both kits are installed I can't boot with anything higher than 2933 Mhz (8 sticks).

I used the following settings (at once) to try and boot with 2 kits (8 sticks) at 3200 Mhz:
  1. Raized SOC voltage (vddcr_soc) to 1.2V
  2. I left vddcr_soc_s5 on Auto as I was unsure what this is. On Auto it reads 0.9V and I can set it no higher than 1.2V
  3. Changed SOC LLC to Level 2
  4. Raized RAM voltage to 1.5V
  5. Loosened the timings to CL16
  6. Changed ProcODT to 60 Ohm
  7. Changed Command Rate to 2T
And I still couldn't boot higher than 2933. sadsmiley.gif I can hit 3600 Mhz, CL15, CR 1T fine with just one kit so I think they should be capable enough. By the way, my BIOS version is 1.5. Would flashing 1.7 (the newest one currently) help run both kits at XMP speed?

Thanks in advance!
]]> Sat, 07 Oct 2017 09:13:16 +0000 https://forum.asrock.com/forum_posts.asp?TID=6275&PID=37531&title=cant-run-2-identical-kits-at-xmp-speed#37531