在 ubuntu 16.04 LTS x64 上无法看到完整的 8GB Ram

在 ubuntu 16.04 LTS x64 上无法看到完整的 8GB Ram

我最近购买了新系统联想 G41-35 并在其中安装了 Ubuntu 16.04 LTS。

我的 RAM 是 8GB,但由于某种原因,它只显示3.3 GiB在详细信息中。

如何在我的 ubuntu 系统中使用 8GB Ram。

查看完整信息:

在此处输入图片描述

以下是一些带有输出的命令:

free -m

输出:

total        used        free      shared  buff/cache   available
Mem:           3354        1080         757          51        1515        1922
Swap:         24412           0       24412

sudo lshw -class memory

输出:

*-firmware              
       description: BIOS
       vendor: Lenovo
       physical id: 0
       version: C3CN54WW
       date: 11/18/2015
       size: 128KiB
       capacity: 8128KiB
       capabilities: pci upgrade shadowing cdboot bootselect edd int5printscreen int9keyboard int14serial int17printer int10video pc98 acpi usb biosbootspecification netboot
  *-cache:0
       description: L1 cache
       physical id: 28
       slot: L1 Cache
       size: 256KiB
       capacity: 256KiB
       clock: 1GHz (1.0ns)
       capabilities: pipeline-burst internal write-back unified
       configuration: level=1
  *-cache:1
       description: L2 cache
       physical id: 29
       slot: L2 Cache
       size: 2MiB
       capacity: 2MiB
       clock: 1GHz (1.0ns)
       capabilities: pipeline-burst internal write-back unified
       configuration: level=2
  *-memory
       description: System Memory
       physical id: 2a
       slot: System board or motherboard
       size: 8GiB
     *-bank:0
          description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
          product: 9905417-075.A00G
          vendor: Kingston
          physical id: 0
          serial: 2C2602BF
          slot: DIMM 0
          size: 4GiB
          width: 64 bits
          clock: 1333MHz (0.8ns)
     *-bank:1
          description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
          product: EBJ40UG8EFU0-GN-F
          vendor: Elpida
          physical id: 1
          serial: 95CB18FD
          slot: DIMM 1
          size: 4GiB
          width: 64 bits
          clock: 1600MHz (0.6ns)

uname -a

输出:

Linux muhammad-mohsin 4.8.0-36-generic #36~16.04.1-Ubuntu SMP Sun Feb 5 
09:39:57 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

uname -m

输出:

x86_64

sudo lshw | grep -m 1 -A 25 "*-memory"

输出:

*-memory
      description: System Memory
      physical id: 2a
      slot: System board or motherboard
      size: 8GiB
    *-bank:0
         description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
         product: 9905417-075.A00G
         vendor: Kingston
         physical id: 0
         serial: 2C2602BF
         slot: DIMM 0
         size: 4GiB
         width: 64 bits
         clock: 1333MHz (0.8ns)
    *-bank:1
         description: SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)
         product: EBJ40UG8EFU0-GN-F
         vendor: Elpida
         physical id: 1
         serial: 95CB18FD
         slot: DIMM 1
         size: 4GiB
         width: 64 bits
         clock: 1600MHz (0.6ns)
 *-pci:0

sudo lshw -short -C memory

输出:

H/W path               Device           Class          Description
==================================================================
/0/0                                    memory         128KiB BIOS
/0/27/28                                memory         256KiB L1 cache
/0/27/29                                memory         2MiB L2 cache
/0/2a                                   memory         8GiB System Memory
/0/2a/0                                 memory         4GiB SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
/0/2a/1                                 memory         4GiB SODIMM DDR3 Synchronous 1600 MHz (0.6 ns)

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