Krdytkyu

I have a RAM problem. I check every questions I could find on askubuntu but couldn't solve my problem myself.

I had two DDR 1333 4Go RAM sticks that worked perfectly well, but I needed more (I run a lot of java JREs). So I bought another DDR 1600 8Go RAM stick (I couldn't find a 1333 on the market)

My problem is that the Bios detects, the RAM, even the "sudo lshw" command detects it, but ubuntu doesn't use it. When I run "top" it tells me I only have 8Go (7.7 to be precise)

Could you please help me to make my ubuntu use my 8Go new RAM stick?

Here are my details :

• cat /proc/version => Linux version 4.15.0-39-generic (buildd@lgw01-amd64-054) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #42-Ubuntu SMP Tue Oct 23 15:48:01 UTC 2018




• cat /etc/issue => Ubuntu 18.04.1 LTS



• 
  

  sudo lshw | grep -m 1 -A 50 "*-memory" (it's in french, sorry, but if you want I can translate it for you)

  
  
  

  
  

  *-memory
  
       description: Mémoire Système
  
       identifiant matériel: 42
  
       emplacement: Carte mère
  
       taille: 16GiB
  
     *-bank:0
  
          description: DIMM DDR3 Synchrone 1333 MHz (0,8 ns)
  
          produit: 99U5474-028.A00LF
  
          fabriquant: Kingston
  
          identifiant matériel: 0
  
          numéro de série: 8519EC10
  
          emplacement: DIMM_A1
  
          taille: 4GiB
  
          bits: 64 bits
  
          horloge: 1333MHz (0.8ns)
  
     *-bank:1
  
       description: DIMMProject-Id-Version: @(#) $Id$Report-Msgid-Bugs-To: PO-Revision-Date: 2016-09-03 00:48+0000Last-Translator: Lyonel Vincent <Unknown>Language-Team: MIME-Version: 1.0Content-Type: text/plain; charset=UTF-8Content-Transfer-Encoding: 8bitX-Launchpad-Export-Date: 2018-07-12 13:19+0000X-Generator: Launchpad (build 18719) [vide]
  
          produit: [Empty]
  
          fabriquant: [Empty]
  
          identifiant matériel: 1
  
          numéro de série: [Empty]
  
          emplacement: DIMM_A2
  
     *-bank:2
  
          description: DIMM DDR3 Synchrone 1333 MHz (0,8 ns)
  
          produit: CL11-11-11 D3-1600
  
          fabriquant: Conexant (Rockwell)
  
          identifiant matériel: 2
  
          numéro de série: 00001C1F
  
          emplacement: DIMM_B1
  
          taille: 8GiB
  
          bits: 64 bits
  
          horloge: 1333MHz (0.8ns)
  
     *-bank:3
  
          description: DIMM DDR3 Synchrone 1333 MHz (0,8 ns)
  
          produit: CML4GX3M1A1600C9
  
          fabriquant: AMI
  
          identifiant matériel: 3
  
          numéro de série: 00000000
  
          emplacement: DIMM_B2
  
          taille: 4GiB
  
          bits: 64 bits
  
          horloge: 1333MHz (0.8ns)
  
  

  
  

  
  

I checked in my Bios (Asus) and the memory remapping is active... I don't know what else I could do. Generaly I always find the solution on your great website, but not this time.

One last thing : the 8Go memory appears as 1333. I think it's because I told my Bios to force the DDR 1333 spead (I tried not forcing the speed, and it changes nothing)

• Here is the motherboard details :
  
  

  
  

  -core

  
  

  
  

  description: Carte mère

  produit: H97M-PLUS

  fabriquant: ASUSTeK COMPUTER INC.

  identifiant matériel: 0

  version: Rev X.0x

  numéro de série: 150138500600431

  emplacement: To be filled by O.E.M.

*-firmware

     description: BIOS

     fabriquant: American Megatrends Inc.

     identifiant matériel: 0

     version: 2305

     date: 10/09/2014

     taille: 64KiB

     capacité: 8128KiB

    fonctionnalités: pci apm upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification uefi

• Here is the ouput for "free -mh":

            Total   Used   Free   Shared   tamp/cache Available

Mem: 7,7G 4,0G 1,6G 118M 2,2G 3,3G
SWAP: 23G 0B 23G