Brief follow up. Yes it is possible. My workstation now runs with 96GB.
My Precision 3930 was deliverd with 2x16GB memory. Now I want to add 2x32GB and I would like to keep the 2x16GB. Is it possile to mix 2x32GB and 2x16GB on this workstation?
Precision 3930 Rack, mixing memory modules with different capacities