AMD Motherboards - X399 Taichi OS only show 48Gb no 64Gb

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X399 Taichi OS only show 48Gb no 64Gb

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=10090
Printed Date: 23 Jul 2025 at 12:16am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: X399 Taichi OS only show 48Gb no 64Gb

Posted By: CoffeeMachine
Subject: X399 Taichi OS only show 48Gb no 64Gb
Date Posted: 06 Nov 2018 at 11:53am

My OS Windows 10 can't see all 64Gb (16X4) installed on the system.

Only 48Gb show.

But in BIOS show 64Gb.

Please help, thanks.

Replies:

Posted By: ASRock_TSD
Date Posted: 06 Nov 2018 at 12:07pm

Dear CoffeeMachine,

Greetings, this is ASRock TSD.

We would like to provide following suggestions for verifying:

1. Please refer to the user manual to clear CMOS. (Page 28)

http://asrock.pc.cdn.bitgravity.com/Manual/X399%20Taichi.pdf" rel="nofollow - http://asrock.pc.cdn.bitgravity.com/Manual/X399%20Taichi.pdf

2. Please install the RAM on A2/B2/C2/D2 slot for verifying. (Page 7)

http://asrock.pc.cdn.bitgravity.com/Manual/X399%20Taichi.pdf" rel="nofollow - http://asrock.pc.cdn.bitgravity.com/Manual/X399%20Taichi.pdf

3. Please install the memory one by one on A2, B2, C2, D2 slot and check if each slot work, detect 16GB for each.

4. Please update to latest BIOS P3.30 for verifying.

http://www.asrock.com/MB/AMD/X399%20Taichi/index.asp#BIOS" rel="nofollow - https://www.asrock.com/MB/AMD/X399%20Taichi/index.asp#BIOS

Thanks!

All the best,

ASRock TSD