AMD Motherboards - Ram Compatibility for ASROCK X399/1920X

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Ram Compatibility for ASROCK X399/1920X

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=13288
Printed Date: 07 Aug 2025 at 7:19am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Ram Compatibility for ASROCK X399/1920X

Posted By: guest23492
Subject: Ram Compatibility for ASROCK X399/1920X
Date Posted: 30 Dec 2019 at 3:14am

I just finished a PC build using the X399 Taichi motherboard with the AMD Threadripper 1920X processor, but on the BIOS, not all of the ram modules are showing up. I'm using the Corsair Vengeance LPX 3200Mhz modules and the first time only 48GB appeared, and after rearranging the RAM sticks, it registered only 32GB (out of 64GB). For reference, it is also running at 2133Mhz instead of 3200Mhz with the drop-down menu in BIOS not being accessible to change the speed. Is this a RAM compatibility issue or an issue with the motherboard? I would appreciate any help I could get as well as references to anyone who has a similar build. Also, if it is a RAM Compatibility issue, are there any recommendations for 64GB kits that work with the TR 1920X/X399 Taichi?