The Windows 7 Forum

[Hailey]

When Microsoft released the Beta of Windows 7 in January, it released a set of recommended system requirements for the Beta (which its officials noted were subject to change). On April 30, concurrent with the beginning of the delivery of the Release Candidate, Microsoft released the final system requirements for Windows 7.

Here are the minimum Windows 7 requirements Microsoft offered in January when it released the Beta:

1GHz processor (32- or 64-bit)
1GB of RAM
16 GB of available disk space
Support for DirectX 9 graphics with 128MB of memory (for the Aero interface)
Here are the minimum Windows 7 system requirements Microsoft released on April 30 when it made available the Release Candidate to MSDN and TechNet testers:

1 GHz processor (32- or 64-bit)
1 GB of RAM (32-bit); 2 GB of RAM (64-bit)
16 GB of available disk space (32-bit); 20 GB of avaiable disk space (64-bit)
DirectX 9 graphics device with WDDM 1.0 or higher driver

Note: If you are planning to run Windows XP Mode along with Windows 7, Microsoft is recommending a PC with a minimum of 2GB of memory and 15 GB of additional disk space.

“In addition, Windows Virtual PC requires a PC with Intel-VT or AMD-V enabled in the CPU, as it takes advantage of the latest advancements in hardware virtualization,” according to company officials.

[anand1]

PLZ let me know why the memory requirements for the 64 Bit version is 2GB than 1GB for 32 Bit version of Windows 7.