Memory testing with Memtest86 MultiCore Mode.
Create a bootable USB as directed below. Boot the system and run the default tests. Most memory issues will surface fairly quickly but let tests complete if CPU's are under suspicion.
Download the attached ISO.
Create Bootable USB from the ISO
Windows:
Load the Image in Rufus.
Click Start to create the USB image. Once complete use the BIOS to ensure the USB is selected in the boot menu.
Linux:
sudo lsblk (Identify your USB device)
sudo umount /dev/sdX (Use the SD device from above)
sudo dd if=/path/to/image.iso of=/dev/sdX bs=4M && sync (Creates USB)
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