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however, the truly unreachable RAM for the 32-bit Desktop Windows OS is above the 4GB line,

which is not necessarily a limitation for a 32-bit server OS starting with Server 2003 certain versions are capable of using much more RAM
see the MSDN article here:

http://msdn.microsoft.com/en-us/library/aa366778%28VS.85%29.aspx

SuperSpeed's RAMDisk and RAMDisk Plus will use the RAM above 4GB on a Desktop OS
- when you use RAMDisk Plus you can also shove the pagefile in the RAM above 4GB