It can be useful to analyze a design based on connectivity. Run Show Connectivity to review the placement of all logic driven by an input, a Block RAM, or a bank of DSPs. Show Connectivity takes a set of cells or nets as a seed, and selects objects of the other type.
The following figure shows a Block RAM driving logic inside the device including OBUFs. A synthesis pragma stops synthesis from placing the output flop in the Block RAM during memory inferencing.