Dear Tsinelas,

Yes it is possible to change the collation on the server level, however it is a complex process and requires a lot of preparation.

You will have a rebuild the master database using the new collation and will have to create all you user databases from scratch.

Refer to BOL for detailed documentation:

# http://msdn.microsoft.com/en-IN/library/ms179254.aspx

Hope it helps..!!!

Regards

Shafat Husain