Originally Posted by thlnk3r
Blitz, probably another limit set by Microsoft?...don't know what to tell you, but Enterprise, Data Center (x86) are all 32-bit OS'es that support more then 4GB of memory.
Unfortunately it is not just a limit set by MS. The 3.5GB limit is inherent in most x86 software not just Windows. This is due to lack of memory address space in x86 versions of Windows (and most other software designed for x86 architecture with some exceptions of course).
Take my current rig for example. I run Vista x64 with 4GB of ram. While Windows recognizes all of my RAM (and can utilize all 4GB if need be) if I run say, an Orthos blend test it will only recognize and test 3.5GB of ram being that the program itself is x86 based and is not able to address all 4GB. Which brings me to another point. Even though we now have OSes that can recognize and utilize 100+GB of ram most of the software (available to the average user anyway) is unfortunately still based on x86 architecture and will use no more than 3.5GB. So, that being said, anything above 4GB is overkill for the time being. The only reason I have 4GB is because I can't run 3.5 in dual channel mode.
Wow I kinda rambled a little didn't I
Sorry if some of it doesn't make sense (although I think it does
). I'm kinda tired.