RE: single 16GB DDR3 in a dell 7500 or dell 5500 precision
You cant install random density and rank of ram. Ram must be installed in banks of 3. that means 3 sticks of the same kind is minimum. KTD-PE313Q8LVK3/48G
You cant install a 4 gig then 8 gig then 16 gig. If you use 16 gig modules they must ALL be 16 gig modules. You cant mix ranks and density and speed.