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Why is it that 32bit Windows XP can only address 3GB [duplicate]

Why is it that 32bit Windows XP can only address 3GB [duplicate]

If Windows XP is a 32-bit operating system, and 2^32 equals 4GB, why can't it support 4GB of memory?

Asked by: Guest | Views: 126
Total answers/comments: 2
Guest [Entry]

"There are other types of memory that also need to be accessed, such as the video memory.

512mb is often used for your vram while the other 3.5 is used for your system ram."
Guest [Entry]

32bit Windows can access up to 4, it's depends on your chipset you can sometimes access 3 and sometimes 4gb of ram