Saturday, December 14, 2013

Maximum Capacity of RAM in Different OS



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OS (Operating System)                                                    Amount of RAM Supported
------------------------- -----------------------------
Windows 8 64 bit Enterprise, Professional                                       512 GB
Windows 8 64 bit                                                                            128 GB
Windows 8 32 bit                                                                             4 GB

Windows 7 64 bit Ultimate, Enterprise & Professional                       192 GB
Windows 7 64 bit Home Premium                                                     16 GB
Windows 7 64 bit Home Basic                                                           8 GB
Windows 7 32 bit (all editions except Starter)                                     4 GB
Windows 7 32 bit Starter                                                                   2 GB

Windows Vista 64 bit Ultimate, Enterprise & Business                     128 GB
Windows Vista 64 bit Home Premium                                                 16 GB
Windows Vista 64 bit Home Basic                                                      8 GB
Windows Vista 32 bit (all editions except Starter)                                4 GB
Windows 7 32 bit Starter                                                                    1 GB

Windows XP 64 bit                                                                             128 GB
Windows XP 32 bit                                                                             4 GB


Mac OS X 64 bit                                                                                96 GB

Linux 64 bit                                                                                        1 TB
Linux 32 bit                                                                                         4 GB
Linux 32 bit (with PAE)                                                                       64 GB


Taking a closer look at the table above, you will notice that 32 bit operating systems can access just 4 GB of RAM

at most.

And there's more bad news: This 4 GB memory limit is shared between RAM and other devices (e.g. video, audio and

network memory) so this further reduces the amount of available RAM to 3 - 3.5 GB in most cases.

Note: If you intend to have 4 GB of RAM or more, it's highly recommended that you install a 64 bit operating

system (unless you are stuck with primitive device drivers or programs that only work in 32 bit).

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