What is the MAXDOP value for the server which doesn't have NUMA
For SQL Server 2005 and later versions

Server with single NUMA node    Less than 8 logical processors  Keep MAXDOP at or below # of logical processors

Server with single NUMA node    Greater than 8 logical processors   Keep MAXDOP at 8

Server with multiple NUMA nodes Less than 8 logical processors per NUMA node Keep MAXDOP at or below # of logical processors per NUMA node

Server with multiple NUMA nodes Greater than 8 logical processors per NUMA node Keep MAXDOP at 8

See : Recommendations and guidelines for the "max degree of parallelism" configuration option in SQL Server