In this page : http://msdn.microsoft.com/en-us/library/ms143685%28v=sql.105%29.aspx It's written that SQL 2008R2 Standard supports 64GB of RAM, but is it per instance?
For SQL2012 (here : http://msdn.microsoft.com/fr-fr/library/cc645993.aspx ) it's written that it's "For a single instance", but not for 2008R2.
This question has already been asked (SQL Server 2008 R2 memory limit per instance or server?) but the answer comes from a test (and not with 64GB), so i'm not sure it will work for me :-)
The goal for me is to get a server with 128GB RAM, with two SQLSERVER2008R2STD, each with 64BG RAM (minus the OS-requiered).