We're upgrading our RAM on our servers.  They all currently have 2gb DIMMS.  We have purchased 8 gb DIMMS.  How would be best add the 8 gb DIMMS to our servers to get the max memory?  

For example, let's say there are currently 8, 2gb DIMMS and we want to add 2, 8 gb DIMMS.  What would be the best configuration for that?

Thank you.