and for inspiron 5720 ... which is the maximum supported memory ... can i use two modules of these? http://www.ec.kingston.com/ecom/configurator_new/partsinfo.asp?root=us&LinkBack=&ktcpartno=KTD-L3C/8...
Inspiron 5720/17R has 2 SODIMM memory slots which support:
Inspiron 5720/17R supports a maximum of 8 GB system memory with 4 GB memory in each slot. The memory you have shared is a single 8GB memory and might not work with the system.
For installing/replacing memory, you may refer to owner's manual Here.
Hope this helps.
You're wrong. The 15R 5520 has a max of 16GB's RAM.