There are several flavors of core dual supporting different options as listed here. (http://www.intel.com/products/processor/core2duo/specifications.htm)
However, I do not see a 2.10g version so it makes it difficult to be 100% certan
I would recommend CPUZ from CPUID as a quick check as what all options your CPU supports.http://www.cpuid.com/softwares/cpu-z.html
If it reports EM64T instructions, your good.