i686 or X86_64

Thanks for taking the time to read my question.

This is my processor.

How do I tell if it's i686 or X86_64?

I have tried to figure this out on the web but can't find anything that convinces me either way.

Thanks again,

Merry Christmas

Brad

 

http://en.wikipedia.org/wiki/Xeon#5100-series_.22Woodcrest.22

 

Thanks!!

Brad