Hi gtrjunior,

The maximum amount of memory that can be installed on this system is 8 GB i.e 4gb on each slot. So there are two slots on this system. The Inspiron N5110 / 15R system supports dual-channel DDR3 SDRAM with memory speeds of 1333 MHz.  For more information on how to install memory you can punch in the service tag in this link http://dell.to/19zbTzI and download the manual. Let me know if you need anything.

There are two sockets - if you have 4G, you have 2, 2G modules -- you'll need to replace one or both of them to upgrade.  The maximum RAM the system will take is 8G total.

Thanks for your responses! Just to recap, if I want to upgrade to 8G, i ned 2 4G cards and then both available slots will be at capacity...? And what comes factory installed? 2 2G cards? and lastly, is there a particular type/brand that is required Or recommended?

thanks again!!

Ok...I see that from the factory there are 2 2G cards installed...

Hi gtrjunior,

Yes your system came with 2gb each. I have mentioned the type of RAM that is installed on your system. You can buy the same specification but check for compatibility before buying.