On Sat, Aug 2, 2008 at 11:28 AM, nate <centos at linuxpowered.net> wrote: > ... The above 64-bit system has 16G, the 32-bit > system above has 2G. > If you have a system with 8x the size of memory than another system, it will _need_ more memory just to run. I run 64-bit CentOS 5.2 on a system with 4GB of ram and have never had a memory problem, and only one time when it was 2GB and I inadvertently tried to open 300+ JPEGs all at the same time. IMNSHO, if you have a 64-bit CPU, unless you have a specific need to run in 32-bit mode, use it (64-bit mode). mhr