RAM Перечислено в dmidecode и bios, но не используется?

Я запускаю ubuntu 20.04 на материнской плате b450m ds3h. У меня есть 4 RAM-флешки по 8 ГБ, которые индивидуально тестировали всю работу на одной плате. Однако, когда я помещаю их все в bios, видит и перечисляет их, ubuntus dmidecode видит и перечисляет их, однако ubuntu использует только 16 ГБ. У меня есть обнаруженная и используемая видеокарта. Так же на всякий случай запустил все доступные обновления. Есть идеи? Похоже, мне просто нужно указать ubuntu на загрузку и как-то его использовать. В любом случае, примите мою благодарность за то, что нашли время.

dmidecode -t 6 output:

# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.2.1 present.
# SMBIOS implementations newer than version 3.2.0 are not
# fully supported by this version of dmidecode.

dmidecode -t 0 | grep -i version

Version: F3

Обновлен BIOS до версии F51

lshw -C memory output:

*-firmware                
   description: BIOS
   vendor: American Megatrends Inc.
   physical id: 0
   version: F51
   date: 07/29/2020
   size: 64KiB
   capacity: 16MiB
   capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int14serial int17printer acpi usb biosbootspecification uefi
*-memory
   description: System Memory
   physical id: 9
   slot: System board or motherboard
   size: 32GiB
 *-bank:0
      description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 1866 MHz (0.5 ns)
      product: CMK16GX4M2B3000C15
      vendor: Unknown
      physical id: 0
      serial: 00000000
      slot: DIMM 0
      size: 8GiB
      width: 64 bits
      clock: 1866MHz (0.5ns)
 *-bank:1
      description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 1866 MHz (0.5 ns)
      product: CMK16GX4M2B3000C15
      vendor: Unknown
      physical id: 1
      serial: 00000000
      slot: DIMM 1
      size: 8GiB
      width: 64 bits
      clock: 1866MHz (0.5ns)
 *-bank:2
      description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 1866 MHz (0.5 ns)
      product: F4-3200C16-8GVGB
      vendor: Unknown
      physical id: 2
      serial: 00000000
      slot: DIMM 0
      size: 8GiB
      width: 64 bits
      clock: 1866MHz (0.5ns)
 *-bank:3
      description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 1866 MHz (0.5 ns)
      product: F4-3200C16-8GVGB
      vendor: Unknown
      physical id: 3
      serial: 00000000
      slot: DIMM 1
      size: 8GiB
      width: 64 bits
      clock: 1866MHz (0.5ns)
*-cache:0
   description: L1 cache
   physical id: b
   slot: L1 - Cache
   size: 768KiB
   capacity: 768KiB
   clock: 1GHz (1.0ns)
   capabilities: pipeline-burst internal write-back unified
   configuration: level=1
*-cache:1
   description: L2 cache
   physical id: c
   slot: L2 - Cache
   size: 4MiB
   capacity: 4MiB
   clock: 1GHz (1.0ns)
   capabilities: pipeline-burst internal write-back unified
   configuration: level=2
*-cache:2
   description: L3 cache
   physical id: d
   slot: L3 - Cache
   size: 16MiB
   capacity: 16MiB
   clock: 1GHz (1.0ns)
   capabilities: pipeline-burst internal write-back unified
   configuration: level=3

Отчет Memtest:

System Information
EFI Specifications  2.70
System  
Manufacturer    Gigabyte Technology Co., Ltd.
Product Name    B450M DS3H
Version     Default string
Serial Number   Default string
BIOS    
Vendor  American Megatrends Inc.
Version     F51
Release Date    07/29/2020
Baseboard   
Manufacturer    Gigabyte Technology Co., Ltd.
Product Name    B450M DS3H-CF
Version     x.x
Serial Number   Default string
CPU Type    AMD Ryzen 7 2700X Eight-Core
CPU Clock   3731 MHz [Turbo: 3730.7 MHz]
# Logical Processors    16
L1 Cache    16 x 96K (82532 MB/s)
L2 Cache    16 x 512K (64487 MB/s)
L3 Cache    1 x 16384K (20557 MB/s)
Memory  16347M (8553 MB/s)
DIMM Slot #0    8GB DDR4 XMP PC4-23900
    Corsair / CMK16GX4M2B3000C15
    15-17-17-35 / 2998 MHz / 1.350V
DIMM Slot #1    8GB DDR4 XMP PC4-25600
    G Skill Intl / F4-3200C16-8GVGB
    16-18-18-38 / 3200 MHz / 1.350V
DIMM Slot #2    8GB DDR4 XMP PC4-23900
    Corsair / CMK16GX4M2B3000C15
    15-17-17-35 / 2998 MHz / 1.350V
DIMM Slot #3    8GB DDR4 XMP PC4-25600
    G Skill Intl / F4-3200C16-8GVGB
    16-18-18-38 / 3200 MHz / 1.350V
Result summary
Test Start Time 2020-10-27 01:24:38
Elapsed Time    5:48:06
Memory Range Tested     0x0 - 41F380000 (16883MB)
CPU Selection Mode  Parallel (All CPUs)
ECC Polling     Enabled
# Tests Passed  48/48 (100%)
Test    # Tests Passed  Errors
Test 0 [Address test, walking ones, 1 CPU]  4/4 (100%)  0
Test 1 [Address test, own address, 1 CPU]   4/4 (100%)  0
Test 2 [Address test, own address]  4/4 (100%)  0
Test 3 [Moving inversions, ones & zeroes]   4/4 (100%)  0
Test 4 [Moving inversions, 8-bit pattern]   4/4 (100%)  0
Test 5 [Moving inversions, random pattern]  4/4 (100%)  0
Test 6 [Block move, 64-byte blocks]     4/4 (100%)  0
Test 7 [Moving inversions, 32-bit pattern]  4/4 (100%)  0
Test 8 [Random number sequence]     4/4 (100%)  0
Test 9 [Modulo 20, ones & zeros]    4/4 (100%)  0
Test 10 [Bit fade test, 2 patterns, 1 CPU]  4/4 (100%)  0
Test 13 [Hammer test]   4/4 (100%)  0