Here is a official product thread
http://www.sony-asia.com/support/product/VPCEH25EN
Can I use two 8gb ram cards in total to form 16gb
Or it two 4gb ram cards total and that's it
http://www.sony-asia.com/support/product/VPCEH25EN
Can I use two 8gb ram cards in total to form 16gb
Or it two 4gb ram cards total and that's it