12 GB is a compatible total per the specs for the 3576. The most compatible RAM is at Crucial and listed here. Now it has always been a toss up as to mixing RAM manufacturers as Dell systems are touchy about that and you may run into problems. The ideal situation is to buy a matched kit and that way you know you have compatible RAM. Personally instead of 12 GB I would buy a 16 GB kit for the maximum compatible configuration.
I Have a Dell Inspiron 15 3576 laptop and I was thinking of a RAM upgrade for it... Then I heard there will be speed-performance issue if I install multiple RAM of different specifications... I have a 4GB RAM and I wants to install an extra 8GB RAM. My laptop has 2 RAM slots and I don't know if the above installation would work as one of the RAMs have 4Gigs size and the other one has 8Gigs size (different spec). This is my CPU-Z result:                                            [IMAGE]   [IMAGE]   could somebody please tell me which RAM should I buy ??? (Please suggest me with matching 4GB RAM and 8GB RAM so that if I want a total of 12 GB, I could buy the 8GB you suggested and if I want total 8GB, I could go for the 4gb one you suggested...) Do I have to install RAM from the same manufacturer ? If so, how do I find out the current manufacturer without opening my laptop ? Do I have to make any changes in the settings after RAM installation, for making it work properly ?
Dell Inspiron 15 3576 Matching RAM upgrade