First, I'm running MGA7 and thought to try to gently install this package since, as I wrote here: https://bugs.mageia.org/show_bug.cgi?id=25232#c20

I've never got any memtest to work from the boot menu and tried this (removed what memtest I could see was installed):

sudo urpme memtester

sudo urpmi http://mirrors.kernel.org/mageia/distrib/cauldron/x86_64/media/core/release/pcmemtest-1.1-2.mga8.x86_64.rpm

sudo update-grub

Rebooted and chose the Pcmemtest entry but got an error: can't find command linux32

Martin asked for this:

[rolf@x570i ~]$ rpm -qa | grep grub2
grub2-common-2.02.0-15.mga7
grub2-mageia-theme-2.02.0-15.mga7
grub2-2.02.0-15.mga7
grub2-efi-2.02.0-15.mga7
[rolf@x570i ~]$

and bonus inxi output follows.  
Thanks.

[root@x570i rolf]# inxi -F
System:    Host: x570i Kernel: 5.6.14-desktop-2.mga7 x86_64 bits: 64 Console: tty 0 Distro: Mageia 7 mga7 
Machine:   Type: Desktop Mobo: ASUSTeK model: ROG STRIX X570-I GAMING v: Rev X.0x serial: 200164285700247 
           UEFI: American Megatrends v: 1405 date: 11/19/2019 
CPU:       Topology: Quad Core model: AMD Ryzen 5 3400G with Radeon Vega Graphics bits: 64 type: MT MCP 
           L2 cache: 2048 KiB 
           Speed: 3787 MHz min/max: 1400/3800 MHz Core speeds (MHz): 1: 3787 2: 3789 3: 3788 4: 3792 5: 3781 6: 3769 
           7: 3788 8: 3786 
Graphics:  Device-1: Conexant Systems CX23887/8 PCIe Broadcast Audio and Video Decoder with 3D Comb driver: cx23885 
           v: 0.0.4 
           Device-2: Conexant Systems CX23887/8 PCIe Broadcast Audio and Video Decoder with 3D Comb driver: cx23885 
           v: 0.0.4 
           Device-3: Advanced Micro Devices [AMD/ATI] Picasso driver: amdgpu v: kernel 
           Display: server: Mageia X.org 1.20.8 driver: amdgpu,v4l resolution: 1: 1600x900~60Hz 2: 1920x1080~60Hz 
           OpenGL: renderer: AMD RAVEN (DRM 3.36.0 5.6.14-desktop-2.mga7 LLVM 8.0.0) v: 4.6 Mesa 20.0.7 
Audio:     Device-1: Conexant Systems CX23887/8 PCIe Broadcast Audio and Video Decoder with 3D Comb driver: cx23885 
           Device-2: Conexant Systems CX23887/8 PCIe Broadcast Audio and Video Decoder with 3D Comb driver: cx23885 
           Device-3: Advanced Micro Devices [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio driver: snd_hda_intel 
           Device-4: Advanced Micro Devices [AMD] Family 17h HD Audio driver: snd_hda_intel 
           Device-5: C-Media C-Media USB Audio Device type: USB driver: hid-generic,snd-usb-audio,usbhid 
           Sound Server: ALSA v: k5.6.14-desktop-2.mga7 
Network:   Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi 
           IF: wlp7s0 state: up mac: 50:eb:71:f7:04:09 
           Device-2: Intel I211 Gigabit Network driver: igb 
           IF: enp8s0 state: up speed: 1000 Mbps duplex: full mac: d4:5d:64:51:25:e0 
           IF-ID-1: docker0 state: down mac: 02:42:e3:50:2e:d4 
           IF-ID-2: vboxnet0 state: down mac: 0a:00:27:00:00:00 
Drives:    Local Storage: total: 5.92 TiB used: 1.94 TiB (32.7%) 
           ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 970 PRO 512GB size: 476.94 GiB 
           ID-2: /dev/sda vendor: Western Digital model: WDS200T2B0B size: 1.82 TiB 
           ID-3: /dev/sdb vendor: Western Digital model: WD20SPZX-22UA7T0 size: 1.82 TiB 
           ID-4: /dev/sdc vendor: Seagate model: ST2000LX001-1RG174 size: 1.82 TiB 
Partition: ID-1: / size: 50.09 GiB used: 44.67 GiB (89.2%) fs: reiserfs dev: /dev/nvme0n1p1 
           ID-2: /home size: 1.68 TiB used: 1.11 TiB (65.8%) fs: reiserfs dev: /dev/sda1 
Swap:      ID-1: swap-1 type: partition size: 4.00 GiB used: 0 KiB (0.0%) dev: /dev/nvme0n1p2 
Sensors:   System Temperatures: cpu: 63.0 C mobo: N/A gpu: amdgpu temp: 63 C 
           Fan Speeds (RPM): N/A 
Info:      Processes: 322 Uptime: 56m Memory: 13.64 GiB used: 6.50 GiB (47.6%) Shell: bash inxi: 3.1.01 
[root@x570i rolf]#