AMD Motherboards - 128gb Memory Not Showing

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128gb Memory Not Showing - X399 Taichi and 2990WX

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=9437
Printed Date: 12 Sep 2025 at 7:06am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: 128gb Memory Not Showing - X399 Taichi and 2990WX

Posted By: mitchfx
Subject: 128gb Memory Not Showing - X399 Taichi and 2990WX
Date Posted: 16 Aug 2018 at 10:45pm

" rel="nofollow - Hello. My PC builder has reported that they cannot get 128GB of memory (gskill rip jaws V 2400mhz 16gb X 8 ddr4) to work with the X399 Tahichi and the 2990WX CPU even using the latest bios. It works with the Threadripper 1 series like 1950X but when using the 2990WX only 64gb shows up. Is this a known issue and if so, will there be a bios fix soon? Thanks!

Replies:

Posted By: ssateneth
Date Posted: 18 Aug 2018 at 1:36pm

reseat your CPU

-------------
MB: X399 Taichi, UEFI L3.32
VGA: EVGA 1080 Ti FTW3
PSU: Seasonic PRIME 1300 W PLATINUM
CPU: AMD Ryzen Threadripper 2950X
MEM: 4x16GB, 3600MHz G.Skill Trident Z F4-3600C17Q-64GTZKW

Posted By: OneArmedMan
Date Posted: 20 Aug 2018 at 7:29am

I have TR! and 32GB over quad channel and had similar issue. I suggest going to single Channel only then doing a clear Cmos then proceed with adding more Ram.