Hello Experts. I am a SQL Server novice in need of assistance. We have an HP DL585 G7 server with 4 AMD Opteron 6276 processors, 16 cores a piece. The server has 384GB of memory. Windows Server 2008 R2 Enterprise SP1 and MS SQL Server 2008 R2 Enterprise are installed. Right now SQL Server is using all 64 cores. As many of you know, paying for 64 cores is outrageous, almost $700,000! Is there away to tell SQL Server to only use 16 cores? I've glanced through the server configuration. In the Processor section, I see 8 NumaNodes (0-7) with 8 CPUs listed under each. Do I simply select 2 NumaNodes and check all 8 CPUs underneath them to get 16 cores? Does it matter which 2 I choose? How do I determine which affinity to use? I'm new at this so please be gentle. I appreciate your time!