FG

Why does 32-bit Windows impose a 2 GB process address space limit, but 64-bit Windows impose a 4GB limit?

Fresh3 days ago
Mar 15, 20267906 views
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Problem

I get that and 2GB is for the OS and 2GB is for the process, but why does a 64 bit OS only give 4GB of address space? Should it not be which when divided evenly amongst the OS and process is a lot more than 4 GB?

Error Output

2^32 = 4,294,967,296

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Fix for: Why does 32-bit Windows impose a 2 GB process address space limit, but 64-bit Windows impose a 4GB limit?

Low Risk

If you look at Memory Limits for Windows Releases The limit for x64 user mode virtual address space is not but at least Some explanation that justifies the limit. By default a 32bit exe is limited to on 64bit os as well unless it is tweaked with

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