Has anyone had reliability issues with 4 GB of memory in Windows XP?
Some say yes others say no I'm just looking for stories.
The probem may have been that you need to add the /3GB switch to the boot.ini for your install(this is per app). Also, your mobo may have something to do with it. Did you try using SPD(auto-configure in the BIOS) for the RAM? The way DataCenter accesses more than 2GB is using the /PAE switch. Also did you turn off the pagefile. Windows gets confused. As far as X64, the limitation for memory size is the processor. Right now AMD has 48-bit addressing so it supports 2 to the 48th power bytes. Intel does I believe have full 64-bit addressing, but even 48-bit is WAYYYYYYYY beyond how much RAM you can add to a single system.