Determine hardware and software requirements (SharePoint Server 2010)

The requirements in the following table apply to single server with built-in database installations and server farm installations that include a single server or multiple servers in the farm.

Component Minimum requirement

Processor 64-bit, dual processor, 3 GHz

RAM 4 GB for stand-alone or evaluation installation

8 GB for single server and multiple server farm installation for production use

Hard disk 80 GB

Other DVD drive

Determine hardware and software requirements (SharePoint Server 2010)

SPSFAQ

The requirements for sharePoint 2010 :
SharePoint Server 2010 will be 64-bit only.
SharePoint Server 2010 will require 64-bit Windows Server 2008 or 64-bit Windows Server 2008 R2.
SharePoint Server 2010 will require 64-bit SQL Server 2008 or 64-bit SQL Server 2005.

Browsers:
read on the web site : http://www.spsfaq.com/2009/05/requirements-for-sharepoint-2010.htm#links - SPSFAQ see also :

http://blogs.msdn.com/sharepoint/archive/2009/05/07/announcing-sharepoint-server-2010-preliminary-system-requirements.aspx