I will try & ask this question a different way.  I ordered a Studio XPS 8000 w/4GB 2 DIMM installed.  I ordered 16GB of OCZ that Dell had on a deal.  It is identified as

4GB 1333MHZ KIT DDR3 with Dell Part  #A3315213 & OCZ part #OCZ3G1333LV4GK.  Info indicates 4 slots open on the MOBO - now is that with the factory memory in or are there only 4 slots total?   In that case will this OCZ RAM give me 8 GB total or possibly 12GB or 16 GB?  - Dell sales support could not provide a clear answer.  Anybody know?

Thanks