http://technet.microsoft.com/en-us/evalcenter/ff183870.aspx 

Je vous invite à la tester et à découvrir toutes ses nouveautés, parmi lesquelles :

 

Changes specific to Windows Server 2008 R2

Dynamic Memory
Microsoft RemoteFX
Enhancements to scalability and high availability when using DirectAccess
Support for Managed Service Accounts (MSAs) in secure branch office scenarios
Support for increased volume of authentication traffic on domain controllers connected to high-latency networks
Enhancements to Failover Clustering with Storage

Changes specific to Windows 7

Improved HDMI audio device performance
Additional support for communication with third-party federation services
Change to behavior of “Restore previous folders at logon” functionality
Enhanced support for additional identities in RRAS and IPsec
Support for Advanced Vector Extensions (AVX)

……