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What are the differences between the 32-bit versions and 64-bit versions of Windows Vista?
|Architecture||32-bit versions of Windows Vista||64-bit versions of Windows Vista|
|Memory access||A 32-bit version of Windows Vista can access up to 4 GB of RAM.||A 64-bit version of Windows Vista can access from 1 GB of RAM to more than 128 GB of RAM.|
|Memory access per edition||All 32-bit versions of Windows Vista can access up to 4 GB of RAM.||Windows Vista Home Basic - 8 GB of RAM
Windows Vista Home Premium - 16 GB of RAM
Windows Vista Business - 128 GB of RAM or more
Windows Vista Enterprise - 128 GB of RAM or more
Windows Vista Ultimate - 128 GB of RAM or more
|DEP||32-bit versions of Windows Vista use a software-based version of DEP.||64-bit versions of Windows Vista support hardware-backed DEP.|
|Kernel Patch Protection (Patch Guard)||
|Kernel Patch Protection helps prevent a malicious program from updating the Windows Vista kernel. This feature works by helping to prevent a kernel-mode driver from extending or replacing other kernel services. Also, this feature helps prevent third-party programs from updating (patching) any part of the kernel.|
|Driver signing||Unsigned drivers may be used with 32-bit versions of Windows Vista.||64-bit versions of Windows Vista require that all device drivers be digitally signed by the developer.|
|32-bit driver support||32-bit versions of Windows Vista support 32-bit drivers that are designed for Windows Vista.||64-bit versions of Windows Vista do not support 32-bit device drivers.|
Article's tag:64-bit 32-bit
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