"Important information about memory: Lenovo notebooks announced April 2007, or after, have a new 64-bit architecture.
The standard memory can be expanded to 3 GB or 4 GB of addressable memory, depending on whether the operating system is a 32-bit or 64-bit operating system. The new notebooks with a Windows Vista 32-bit or previous Windows 32-bit operating system can support up to 3 GB of addressable memory. The new notebooks that have a Windows Vista 64-bit operating system can support up to 4 GB of addressable memory."
Seems nobody pays attention to this new feature.





