Taichi X399 RAM problems
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=17537
Printed Date: 10 Aug 2025 at 7:45pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Taichi X399 RAM problems
Posted By: Gene_Starwind
Subject: Taichi X399 RAM problems
Date Posted: 18 Dec 2020 at 9:40pm
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I am running a Threadripper 1920X, 12-core. I have 8 DIMMs, all identical (Corsair Vengeance RBG Pro 2666MHz, 16GB) and listed in the manual that came with the MB. Here's the problem: It will NOT recognize the DIMMs in C1 and C2. Now, I know the DIMMs cannot be broken, as the PC boots just fine. Why won't it recognize those 2 DIMMs and why the specific slots? |
Replies:
Posted By: Xaltar
Date Posted: 19 Dec 2020 at 1:09am
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It's missing that channel. Most likely you need to reseat the CPU. ------------- 
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Posted By: Gene_Starwind
Date Posted: 19 Dec 2020 at 1:11am
How is that possible? There is no way the CPU is not aligned properly, otherwise I would NOT be typing this as I am using that very PC. Task Mgr shows all 24 logical processors. Your comment makes absolutely ZERO sense. |
Xaltar wrote:Posted By: Gene_Starwind
Date Posted: 19 Dec 2020 at 1:13am
| Furthermore, IF the CPU were somehow not seated properly, how was I able to lock it down in the cradle without effort? How did I successfully mount the Corsair H100i RGB Pro Platinum liquid cooling kit? How does this computer even WORK?! |
Posted By: Xaltar
Date Posted: 19 Dec 2020 at 8:03am
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You are talking about a CPU with 4094 pins. A single pin not making contact properly can cause anything from missing PCIe lanes, a system that won't power on or, missing memory channels. In fact, it is probably the number one cause for the exact issue you mentioned. You would be surprised how many pins your system can run without, in many cases without you even noticing. With Threadripper, reseating the CPU is the number 1 troubleshooting step when RAM channels are not working. Pins could be making poor or intermittent contact due to something as silly as uneven mounting pressure or over tight CPU cooler/ water block. For future reference, when someone takes the time to provide you with a suggestion to fix your problem, don't throw it back in their face, even if it is a stupid suggestion (this was not).I did nothing to deserve the attitude other than offer assistance based on my significant experience, not only with PCs in general but with Threadripper in particular. Could the problem be caused by something else? Certainly but this is the first troubleshooting step with an HEDT CPU owing to the vast number of pins. If the attitude is because you think I am an ASRock employee, I am not and even then there is no cause for rudeness. Keep it friendly and you may find more people respond to your thread. -------------
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Posted By: Gene_Starwind
Date Posted: 30 Dec 2020 at 2:45am
I am sorry, Mr. Board Lord, that my four decades of experience building computers made the initial claim without any supporting documentation or detailed explanation something that comes across as laughable. Details and facts matter. The commenter left out important information. How is that MY fault, since you blame ME for everything? I can add that CPU-Z sees the RAM. All eight of them. I should point out that your basis is that the X399 Taichi is an inherently defective design because of the fact that the builder cannot seat the CPU manually, unless there is an undeclared method that goes outside what the manuals all say to do. I followed the manual completely. If ASRock left out something, then whose fault would that be? I may be Autistic, but I am far from retarded. BTW: with a liquid cooler and fully-assembled PC, how long would it take to remove the CPU without effectively fully dismantling the PC? |