Adventures of putting 16 GB of RAM in a motherboard that doesn’t support it

The reason Linux works with 16 GB is because it notices the conflict and ignores the conflicting PCI range that ACPI provides, whereas Windows throws up its hands in disgust and pukes out a blue screen that says, “your BIOS has a problem!” The last 768 MB chunk of my RAM from 0x400000000 to 0x42fffffff was mapped to the start of a huge area of the memory space that my motherboard uses for PCI stuff. Then, I used GRUB to replace the OEMB table with my copy by temporarily inserting the following command into the boot command list (by typing the letter ‘e’ in GRUB with Ubuntu selected):

The idea here is that it tells GRUB to load all ACPI tables except the OEMB table, and then tells it to load the content of /boot/oemb.

Source: www.downtowndougbrown.com