Checks an instance of SQL Server having processors that are assigned with both the affinity mask and the affinity I/O mask ...

Checks an instance of SQL Server having processors that are assigned with both the affinity mask and the affinity I/O mask options. On a computer that has more than one processor, the affinity mask and the affinity I/O mask options are used to designate which CPUs are used by SQL Server. Enabling a CPU with both the affinity mask and the affinity I/O mask can slow performance by forcing the processor to be overused.