One example is Windows 7's XP Mode feature, which allows you to use legacy applications within a virtual machine running within Windows XP. Moreover, it is only a matter of time until 3GB will no longer be enough for modern applications. Thus, if you install Windows 7 64-bit on a 4 GB machine you won't waste 1 GB of RAM like you would with Windows 7 32-bit. By contrast, Windows 7 圆4 cannot only make use of up to 16TB 192GB RAM, but is capable of using the memory remapping feature of modern BIOSes, which allows the operating system to really use the complete 4GB.
The problem is that like Vista, Windows 7 x86 is capable of only using about 3 GB of RAM. One thing that has changed since I last concerned myself with this topic is that most new desktops and laptops now come with at least 4GB of RAM.
The most significant advantage of a 64-bit system is that it can use more than 4GB of RAM.
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