To all the power users out there who are running 4GB RAM or more on typical 34bit systems, you may realize that only about 3GB of that RAM can be used by the operating system efficiently. The remaining memory is pretty much wasted due to the nature of 32bit addressing making it a bummer if you have spent all that money to get so much RAM.
Only 3GB of RAM can be used by 34bit Systems
The reason this is a problem is due to the way 32bit systems allocate addresses. Back in the days, 4GB of ANYTHING was considered huge and as a result, the assumption that we would never need so much of anything was made. Well, fast forward a few decades and the problem is coming back to haunt us.

You may also notice that the limitation is also apparent in hard disks still running FAT32 filesystems. On those filesystem, you cannot have a single file exceeding 4GB in size, otherwise the OS will complain about running ‘out of space’. Nowadays, people are running on NTFS which do not have such a limitation.
Continue reading “Use RAMDISK on 32bit systems with 4GB RAM”










