Advantage of 64-bit OS for SharePoint Server 2010

Advantage of 64-bit OS for SharePoint Server 2010

The main reason for building SharePoint Server 2010 on 64-bit OS is
(remember optimum benefit is derived only when 64-bit hardware and software are working together)

1. A server that has both a 64-bit CPU and a 64-bit data bus is better able to process and manage the large database files associated with Office SharePoint Server 2007. Among other benefits, a 64-bit CPU can calculate individual tasks two times as fast as a 32-bit model and can address significantly more random access memory (RAM) than the 4-gigabyte (GB) limit imposed by 32-bit processors. The prevalence of 32-bit servers puts some limitations on the speed, reliability, and scalability of applications that require a lot of resources, such as Office SharePoint Server 2007.
2) A 32-bit system architecture can directly address only a 4-GB address space whereas a 64-bit system architecture that is running a 64-bit edition of Windows Server can support up to 1,024 GB of both physical and addressable memory.
3) The 64-bit editions of Windows Server can address 16 terabytes of virtual memory by using a flat addressing model.
4) A 64-bit system offers practically unlimited address space for user mode processes.
5) Improvements in parallel processing and bus architectures enable 64-bit environments to support as many as 64 processors and provide almost linear scalability with each additional processor.
6) Function calls are also faster in a 64-bit environment because as many as four arguments at a time can be passed in registers to a function.
7) It is less likely that the buffer will overflow
8) Fewer lost connections, improved I/O handling