Kubuntu 22.04

vmelkon · 12-02-2023, 11:50 PM

Kubuntu 22.04

Why does Info Center report slightly less RAM than I have.
I have 24 GB. It reports that I have 23.4 GB.
600 MB missing?
It says 23.4 GB on the About this System page.
I don't have integrated video.
I have a AMD RX 6800 16 GB graphics card.

I have installed CPU-X.
On the memory tab, it says 23.41 GB.
Is there an application that can detect which slots are populated by what DIMM and the size and timings of the DIMM?

mrmazda · 12-03-2023, 02:20 AM

It's unlikely you have 24GB. What you probably have is 24GiB. See here for background. Different reporting tools have different methods of reporting, some using GB correctly, some using GiB correctly, some using neither correctly, some using a mixture. Make sure dmidecode is installed, then try these:

Code:

# free
              total        used        free      shared  buff/cache   available
Mem:       16303064      532264    15708968        1928      339616    15770800
Swap:       1052220           0     1052220
# free -h
              total        used        free      shared  buff/cache   available
Mem:           15Gi       519Mi        14Gi       1.0Mi       331Mi        15Gi
Swap:         1.0Gi          0B       1.0Gi
# sudo inxi -ma
Memory:
  System RAM: total: 16 GiB available: 15.55 GiB used: 559.5 MiB (3.5%)
  Array-1: capacity: 32 GiB note: est. slots: 4 modules: 2 EC: None
    max-module-size: 8 GiB note: est.
  Device-1: A0 info: double-bank type: N/A size: 8 GiB speed: 1600 MT/s
    volts: N/A width (bits): data: 64 total: 64 manufacturer: N/A part-no: N/A
    serial: N/A
  Device-2: A1 info: double-bank type: N/A size: 8 GiB speed: 1600 MT/s
    volts: N/A width (bits): data: 64 total: 64 manufacturer: N/A part-no: N/A
    serial: N/A
  Device-3: A2 type: no module installed
  Device-4: A3 type: no module installed

memtest86 and memtest86+ try to report DIMM slots, size and timings.

vmelkon · 12-03-2023, 12:23 PM

I am not talking about the metric system issue.

If you want to use the EIC words, it would be 24 GiB but why doesn't Info Center provide the right numbers.

If I run
sudo free, I get

Code:

               total        used        free      shared  buff/cache   available
Mem:        24545296     7086024     5567836      736488    11891436    16325484
Swap:       29286396      678420    28607976

but again, there is 600 MB missing
24545296 / 1024 / 1024 = 23.41 GB

michaelk · 12-03-2023, 01:32 PM

What is the make/model of your motherboard?
It would be nice to see the info from the inxi command as posted.

vmelkon · 12-04-2023, 07:02 PM

Quote:

Originally Posted by michaelk

What is the make/model of your motherboard?
It would be nice to see the info from the inxi command as posted.

Code:

$ sudo inxi -ma
Memory:
  RAM: total: 23.41 GiB used: 6.93 GiB (29.6%)
  Array-1: capacity: 128 GiB slots: 4 EC: None max-module-size: 32 GiB
    note: est.
  Device-1: DIMM 0 size: 8 GiB speed: 3200 MT/s type: DDR4
    detail: synchronous unbuffered (unregistered) bus-width: 64 bits
    total: 64 bits manufacturer: G.Skill part-no: F4-3200C16-8GFX serial: N/A
  Device-2: DIMM 1 size: 4 GiB speed: 3200 MT/s type: DDR4
    detail: synchronous unbuffered (unregistered) bus-width: 64 bits
    total: 64 bits manufacturer: G.Skill part-no: F4-3200C16-4GVRB
    serial: N/A
  Device-3: DIMM 0 size: 8 GiB speed: 3200 MT/s type: DDR4
    detail: synchronous unbuffered (unregistered) bus-width: 64 bits
    total: 64 bits manufacturer: G.Skill part-no: F4-3200C16-8GFX serial: N/A
  Device-4: DIMM 1 size: 4 GiB speed: 3200 MT/s type: DDR4
    detail: synchronous unbuffered (unregistered) bus-width: 64 bits
    total: 64 bits manufacturer: G.Skill part-no: F4-3200C16-4GVRB
    serial: N/A

The motherboard is a MSI B350 TOMAHAWK AM4 AMD
https://www.msi.com/Motherboard/B350-TOMAHAWK.html

michaelk · 12-04-2023, 07:22 PM

I did not read the entire manual but on page 26:

Quote:

Due to chipset resource usage, the available capacity of memory will be a little less
than the amount of installed.

I don't know what defines a little less but the manual may have more information.