The shown RAM available is less than the installed nominal RAM

Support
1

I have upgraded my mini pc with additional 8 GB RAM, so in total now 16 GB :space_invader:. In details a DDR4 ADATA (was already there), plus a DDR4 Crucial, both SO-DIMM 1.2v CL19. As shown here below:

# dmidecode 3.4
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.

Handle 0x000A, DMI type 16, 23 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: None
        Maximum Capacity: 32 GB
        Error Information Handle: 0x0009
        Number Of Devices: 2

Handle 0x0011, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x000A
        Error Information Handle: 0x0010
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8 GB
        Form Factor: SODIMM
        Set: None
        Locator: DIMM 0
        Bank Locator: P0 CHANNEL A
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2667 MT/s
        Manufacturer: Unknown
        Serial Number: E66C8BEC
        Asset Tag: Not Specified
        Part Number: CT8G4SFRA266.C8FP
        Rank: 1
        Configured Memory Speed: 2400 MT/s
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

Handle 0x0014, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x000A
        Error Information Handle: 0x0013
        Total Width: 64 bits
        Data Width: 64 bits
        Size: 8 GB
        Form Factor: SODIMM
        Set: None
        Locator: DIMM 0
        Bank Locator: P0 CHANNEL B
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2667 MT/s
        Manufacturer: A-DATA Technology
        Serial Number: C22D0000
        Asset Tag: Not Specified
        Part Number:                     
        Rank: 1
        Configured Memory Speed: 2400 MT/s
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

Question 1:
is it okay to have : Type Detail: Synchronous Unbuffered (Unregistered)?
is it okay that for the Crucial RAM is Manufacturer: Unknown?

Now if I do running free command:

free                                                                
               total        used        free      shared  buff/cache   available
Mem:           13935        1460       11087          59        1386       12095

Question 2:
Why is the total RAM less than 16GB?
even considering 13.935 MiB, I’d have roughly 14.611 GB out of 16 GB, is it right?

I know, maybe it is fine, but any insight abuout this curiosity is very welcome. :grin:

2

Integrated GPUs can use some RAM for video exclusively.

This can also be controlled / adjusted in some BIOSes.

What graphics card do you have?

1 Like
3

It is generally recommended to use identical RAM sticks by the same manufacturer.
I don’t see any other issues.

4

your CPU 3550H use share memory for video ,
about 2Gb in best mode Dual channel

this memory video part cant be use for classic memory usage , it is reserved for video ONLY

see also

inxi -Fza
5

CPU: AMD Ryzen 5 3550H
GPU: AMD Radeon Vega 8

6 
System:
  Kernel: 5.15.59-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 12.1.1
    parameters: BOOT_IMAGE=/boot/vmlinuz-5.15-x86_64
    root=UUID=43a6fe7a-faf8-4cf4-bae1-5d5292c8119c rw quiet apparmor=1
    security=apparmor udev.log_priority=3
  Desktop: KDE Plasma v: 5.24.6 tk: Qt v: 5.15.5 wm: kwin_x11 vt: 1
    dm: SDDM Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Desktop Mobo: BESSTAR TECH model: UM350 serial: <superuser required>
    UEFI: American Megatrends v: 5.14 date: 03/24/2022
CPU:
  Info: model: AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx bits: 64
    type: MT MCP arch: Zen/Zen+ note: check gen: 1 built: 2019 process: GF 12nm
    family: 0x17 (23) model-id: 0x18 (24) stepping: 1 microcode: 0x8108109
  Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
    L1: 384 KiB desc: d-4x32 KiB; i-4x64 KiB L2: 2 MiB desc: 4x512 KiB
    L3: 4 MiB desc: 1x4 MiB
  Speed (MHz): avg: 1404 high: 1517 min/max: 1400/2100 boost: enabled
    scaling: driver: acpi-cpufreq governor: schedutil cores: 1: 1443 2: 1509
    3: 1517 4: 1377 5: 1333 6: 1354 7: 1360 8: 1341 bogomips: 33549
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
  Vulnerabilities:
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data status: Not affected
  Type: retbleed mitigation: untrained return thunk; SMT vulnerable
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl and seccomp
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, STIBP:
    disabled, RSB filling
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: AMD Picasso/Raven 2 [Radeon Vega Series / Radeon Mobile Series]
    driver: amdgpu v: kernel arch: GCN-5 code: Vega process: GF 14nm
    built: 2017-20 pcie: gen: 3 speed: 8 GT/s lanes: 16 ports:
    active: HDMI-A-1 empty: DP-1,DP-2,DP-3 bus-ID: 04:00.0 chip-ID: 1002:15d8
    class-ID: 0300
  Display: x11 server: X.Org v: 21.1.4 compositor: kwin_x11 driver: X:
    loaded: modesetting alternate: fbdev,vesa gpu: amdgpu display-ID: :0
    screens: 1
  Screen-1: 0 s-res: 3840x2160 s-dpi: 96 s-size: 1016x571mm (40.00x22.48")
    s-diag: 1165mm (45.88")
  Monitor-1: HDMI-A-1 mapped: HDMI-1 model: Samsung LU28R55
    serial: <filter> built: 2021 res: 3840x2160 hz: 60 dpi: 154 gamma: 1.2
    size: 632x360mm (24.88x14.17") diag: 727mm (28.6") ratio: 16:9 modes:
    max: 3840x2160 min: 720x400
  OpenGL: renderer: AMD Radeon Vega 8 Graphics (raven LLVM 14.0.6 DRM 3.42
    5.15.59-1-MANJARO) v: 4.6 Mesa 22.1.4 direct render: Yes
Audio:
  Device-1: AMD Raven/Raven2/Fenghuang HDMI/DP Audio driver: snd_hda_intel
    v: kernel pcie: bus-ID: 3-2.1:4 chip-ID: 0d8c:0014 gen: 3 speed: 8 GT/s
    class-ID: 0300 lanes: 16 bus-ID: 04:00.1 chip-ID: 1002:15de
    class-ID: 0403
  Device-2: AMD ACP/ACP3X/ACP6x Audio Coprocessor driver: snd_pci_acp3x
    v: kernel alternate: snd_rn_pci_acp3x,snd_pci_acp5x pcie: gen: 3
    speed: 8 GT/s lanes: 16 bus-ID: 04:00.5 chip-ID: 1022:15e2 class-ID: 0480
  Device-3: AMD Family 17h/19h HD Audio vendor: Realtek
    driver: snd_hda_intel v: kernel pcie: gen: 3 speed: 8 GT/s lanes: 16
    bus-ID: 04:00.6 chip-ID: 1022:15e3 class-ID: 0403
  Device-4: C-Media Audio Adapter (Unitek Y-247A) type: USB
    driver: cmedia_hs100b,snd-usb-audio,usbhid
  Sound Server-1: ALSA v: k5.15.59-1-MANJARO running: yes
  Sound Server-2: JACK v: 1.9.21 running: no
  Sound Server-3: PulseAudio v: 16.1 running: yes
  Sound Server-4: PipeWire v: 0.3.56 running: yes
Network:
  Device-1: Intel Wireless 7265 driver: iwlwifi v: kernel pcie: gen: 1
    speed: 2.5 GT/s lanes: 1 bus-ID: 02:00.0 chip-ID: 8086:095a class-ID: 0280
  IF: wlp2s0 state: up mac: <filter>
  Device-2: Intel Ethernet I225-V driver: igc v: kernel pcie: gen: 1
    speed: 2.5 GT/s lanes: 1 link-max: gen: 2 speed: 5 GT/s port: N/A
    bus-ID: 03:00.0 chip-ID: 8086:15f3 class-ID: 0200
  IF: enp3s0 state: down mac: <filter>
Bluetooth:
  Device-1: Intel Bluetooth wireless interface type: USB driver: btusb v: 0.8
    bus-ID: 3-2.2:5 chip-ID: 8087:0a2a class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 1 state: up address: see --recommends
Drives:
  Local Storage: total: 119.24 GiB used: 103.75 GiB (87.0%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Kingston model: OM8PDP3128B-A01
    size: 119.24 GiB block-size: physical: 512 B logical: 512 B
    speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter> rev: EDFK0S03
    temp: 38.9 C scheme: GPT
Partition:
  ID-1: / raw-size: 118.95 GiB size: 116.52 GiB (97.96%) used: 103.75 GiB
    (89.0%) fs: ext4 dev: /dev/nvme0n1p2 maj-min: 259:2
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%) used: 288 KiB
    (0.1%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
Swap:
  Alert: No swap data was found.
Sensors:
  System Temperatures: cpu: 40.4 C mobo: N/A gpu: amdgpu temp: 40.0 C
  Fan Speeds (RPM): N/A
Info:
  Processes: 264 Uptime: 3m wakeups: 0 Memory: 13.61 GiB used: 1.74 GiB
  (12.8%) Init: systemd v: 251 default: graphical tool: systemctl
  Compilers: gcc: 12.1.1 clang: 14.0.6 Packages: pacman: 1256 lib: 351
  flatpak: 0 Shell: Zsh v: 5.9 default: Bash v: 5.1.16 running-in: konsole
  inxi: 3.3.20
7

@fumum_vendidi @winnie @stephane thank you all very much!

8

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