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Memory in server systems

Greetings:

I have an HP Proliant DL580 G2 server (4 3ghz xeon mp processors). I understand this to be a 32bit system. Why am I allowed to upgrade to 32 gb of ram if only 4gb are accessible on 32bit systems? I don't necessarily have a need for a 64bit system but I'd definitely take advantage of the additional memory if I could.
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More about memory server systems
  1. Do you have a Xeon MP with 64-bit support? If so, all you would need to do would be to upgrade the operating system to a 64-bit operating system to use all 32gb of memory.
  2. No I believe the G2 Xeon MP processors are 32bit.
  3. Intel Xeon MP processors and yes it does support x64 server OS.
  4. Best answer
    The 32 bit Server O/S support more that 4GB of memory using a technology called PAE or Physical Address Extension.
    This allowed the 32 bit version of Server 2003 to support 32GB in the Enterprise version and 64GB in the Data Centre version.
    Even with this the apps could only use 2GB of ram per instance unless they were written with the ability to use more (up to 3GB) with extra switches in the Boot.ini.
  5. Best answer selected by ELSADDIQ.
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