I have a dell poweredge R710, currently with 96GB of memory , and with the 8GB DIMMS installed in the following slots:
A1, A4, A2, A5, A3, A6
and
B1, B4, B2, B5, B3, B6

The 8GB DIMMS have the following inscriptions on them:

8GB 2Rx4 PC3 - 10600R-9-10-E1

 

Now I want to add the two 16GB DIMMs to the existing 96 GB to make a total of 128GB on my server.

The 16GB DIMMS have the following inscriptions on them:

16GB 2Rx4 PC3L -10600R-9-13-E2

 

Please recommend:

1) what is the best or optimal memory configuration to use the above batches of 8GB and 16GB DIMMs on the dell poweredge R710, to get 1333Mhz and 128 GB total RAM ?

2) as noted, the 8GB is PC3 and the 16GB is PC3L.  Does this make a  difference, and are both compatible to be working concurrently with other ?