Ram Not getting detected

[felix920506]

I installed 4GB of Ram into a board but it only shows 3319MB in the BIOS

CPU: Pentium D 820
MB: Gigabyte GA-8I945GZME-RH
RAM: Kingmax DDR2-800 2GB *2

 

This board requires Floppy to update BIOS but I don't have a Floppy Drive

[Guest]

Your motherboard uses Intel's i945 chipset, which supports a maximum address space of 4GB and does not support memory remapping. Given that some of that address space have to stay reserved for other devices, you will never be able to use more than 3.2GB RAM, despite having two 2GB sticks.

 

Upgrading BIOS will not help, as it is a chipset (hardware) limitation, not a software one.

 

You can find more information in Intel's official datasheet - page 211 more specifically.
 

Quote

This means that as the amount of physical memory populated in the system reaches 4 GB (2 GB for the 82945GC/82945GZ/82945PL), there will be physical memory that exists yet is non-addressable and therefore unusable by the system.