ASRock Forums : Asrock X99 Extreme11 reports only 48GB https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 30 Jun 2026 05:03:25 +0000 Tue, 30 May 2017 00:32:00 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=5247 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[Asrock X99 Extreme11 reports only 48GB : BIOS reports only 48 GB of RAM...]]> https://forum.asrock.com/forum_posts.asp?TID=5247&PID=30046&title=asrock-x99-extreme11-reports-only-48gb#30046 Author: lmax25
Subject: 5247
Posted: 30 May 2017 at 12:32am

BIOS reports only 48 GB of RAM instead of 64 GB. (see attached photo)

The memory module from D1 slot is reported on starting screen as blank
(I switched memory modules and all 4 are working fine)

But the System Browser Utility from BIOS reports that all 4 DDR4
memory slots A1,B1,C1,D1 have each one a memory module installed. (see
attached photos)

Windows 7 Ultimate +SP1 X64 bit system reports only 48 GB of RAM
instead of 64 GB (I installed all 4 memory modules on slots
A1,B1,C1,D1) (see attached photo)

AIDA64 reports all 4 memory modules on slots A1,B1,C1,D1. (see attached photo)


Please tell me what to do with the fourth DDR4 memory module because
after I installed Windows and all the updates, my system starts
crashing...

How can I solve the memory problem ?
Thank You !
 
I increased the RAM voltage from 1.20 V to 1.35 V but no change. Still 48 GB of RAM
I set MRC Fast Boot to DISABLED
I set Memory Test to ENABLED
Here you will find some screen capture files that may help :
https://www.google.com/url?q=https%3A%2F%2Fwe.tl%2FOoVehGxw4a&sa=D&sntz=1&usg=AFQjCNHI88jyeI3sRzBnEk12hlhbRDb2bw
]]> Tue, 30 May 2017 00:32:00 +0000 https://forum.asrock.com/forum_posts.asp?TID=5247&PID=30046&title=asrock-x99-extreme11-reports-only-48gb#30046 <![CDATA[Asrock X99 Extreme11 reports only 48GB : lmax25 wrote: Hello !My new...]]> https://forum.asrock.com/forum_posts.asp?TID=5247&PID=30023&title=asrock-x99-extreme11-reports-only-48gb#30023 Author: parsec
Subject: 5247
Posted: 29 May 2017 at 9:24am

Originally posted by lmax25 lmax25 wrote:

Hello !
 
My new Asrock X99 Extreme11 MB reports only 48GB of RAM instead of 64GB of RAM.
I have Bios version 3.20.
I installed HyperX Savage Black 64GB DDR4 2400MHz CL14 Quad Channel Kit
manufacturer code : HX424C14SBK4/64 and
CPU Intel® Core??i7-6850K, 3.60GHz , Broadwell, 15MB, Socket 2011-V3
 
Please tell me how to configure the RAM from BIOS to use all 64 GB of RAM installed.
 
Thank You !


"Missing memory" is not uncommon when larger capacities are used on X99 systems. If only it was just some option settings that would easily fix the issue, but that is not a given.

Apparently one DIMM is not being recognized, have you identified the memory slot in which it is mounted?

What is telling you that only 48GB is being recognized? Windows? The UEFI/BIOS? Both?

If you open Resource Monitor in Windows, Memory tab, what is shown?

Not much information given in your post, so mostly questions at this point.

Which DIMM slots are you using, the A1, B1, etc, or A2, B2, etc?

All default or Auto basic memory option settings in the UEFI/BIOS?

What speed is the memory operating at currently? Did you enable the XMP profile?

Is 48GB only recognized at both 2133 and 2400 memory speeds?

Have you done any testing to verify that all four of the DIMMs in the memory kit are working?

Initial UEFI/BIOS option settings to set and try are:

OC Tweaker, Voltage Configuration screen:

Set DRAM Voltage to 1.25V - 1.3V - 1.35V, in steps and check if the memory is recognized. Start with 1.3V and if that works you can try to reduce it to 1.25V.

OC Tweaker, DRAM Configuration screen:

At the very bottom of this screen, find MRC Fast Boot, and set it to Disabled.

Next, find Memory Test, and set it to Enabled.

You do not need to leave these option set this way permanently, but at least for several restarts/boots of the PC to allow memory training and testing to occur.
]]> Mon, 29 May 2017 09:24:58 +0000 https://forum.asrock.com/forum_posts.asp?TID=5247&PID=30023&title=asrock-x99-extreme11-reports-only-48gb#30023 <![CDATA[Asrock X99 Extreme11 reports only 48GB : Hello !My new Asrock X99 Extreme11...]]> https://forum.asrock.com/forum_posts.asp?TID=5247&PID=30014&title=asrock-x99-extreme11-reports-only-48gb#30014 Author: lmax25
Subject: 5247
Posted: 29 May 2017 at 4:25am

Hello !
 
My new Asrock X99 Extreme11 MB reports only 48GB of RAM instead of 64GB of RAM.
I have Bios version 3.20.
I installed HyperX Savage Black 64GB DDR4 2400MHz CL14 Quad Channel Kit
manufacturer code : HX424C14SBK4/64 and
CPU Intel® Core??i7-6850K, 3.60GHz , Broadwell, 15MB, Socket 2011-V3
 
Please tell me how to configure the RAM from BIOS to use all 64 GB of RAM installed.
 
Thank You !
]]> Mon, 29 May 2017 04:25:13 +0000 https://forum.asrock.com/forum_posts.asp?TID=5247&PID=30014&title=asrock-x99-extreme11-reports-only-48gb#30014