Windows 7 System Requirement

After reading Windows 7 System Requirement,I puzzle that why memory requirement for x86 and x64 is different.

Basically, my understanding is that x64 can locate more memory address space than x86 architecture.

I don’t know why memory requirement for x64 Windows 7 is higher than x86?? 1GB vs 2GB ?? 50% more ???

x64 needs more RAM???? I wonder if there is any MS product team guy can explain it more. It is interesting that why x64 needs more memory for running Windows 7.


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