Can't run 2 identical kits at XMP speed
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=6275
Printed Date: 26 Dec 2024 at 10:45pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Can't run 2 identical kits at XMP speed
Posted By: duke
Subject: Can't run 2 identical kits at XMP speed
Date Posted: 07 Oct 2017 at 9:13am
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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 https://gskill.com/en/product/f4-3200c14q-32gfx" rel="nofollow - 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:
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! |
Replies:
Posted By: Xaltar
Date Posted: 07 Oct 2017 at 6:51pm
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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  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  ------------- 
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Posted By: duke
Date Posted: 07 Oct 2017 at 8:15pm
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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. |
Posted By: datonyb
Date Posted: 07 Oct 2017 at 8:38pm
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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 ------------- [url=https://valid.x86.fr/jpg250]  [/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
Posted By: datonyb
Date Posted: 07 Oct 2017 at 8:40pm
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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 ------------- [url=https://valid.x86.fr/jpg250] [/url]3800X, powercolor reddevil vega64, gskill tridentz3866, taichix370, evga750watt gold |
Posted By: duke
Date Posted: 07 Oct 2017 at 9:31pm
Yes, I have 8 sticks of total 64GB RAM (I have 2 kits of these - http://gskill.com/en/product/f4-3200c14q-32gfx" rel="nofollow - F4-3200C14Q-32GF ). |
datonyb wrote: