Memory Remapping allows for the installed but previously unusable memory to be utilised to its full potential. It renders the previously “invisible” memory, beyond the 4GB limitation, visible. Memory Remapping isn’t much use to 32-Bit systems; however, as the system limitation of 32-Bits ultimately corresponds to 4GB.

What is memory hole in BIOS?

Often, in the computer’s BIOS setup under the Advanced Chipset Features, there is an option for Memory Hole at 15M-16M, with the available options of Disabled and Enabled. This setting allows users to enable or disable the 1 MB of memory required by some ISA expansion cards.

How do I fix usable RAM in BIOS?

In the BIOS (or UEFI) go into Advanced, Chipset tab, go down to Memory Map Feature, which is currently disabled, press Enter and select Enabled. This will enable the 64 bit system to make use of full or more RAM available. You can save changes and exit by pressing F10 to restart the computer.