I'm looking to purchase more RAM for a 2009 MBP and a 2010 MBP, upgrading from 2GB and 4GB respectively. The laptops are used primarily for school and watching media, no gaming. Will this be compatible: http://www.newegg.com/Product/Produ...-cables-_-na-_-na&Item=N82E16820231704&cm_sp= Is this a good purchase in terms of performance? And what exactly do I need to look for when checking compatibility? The number of pins and anything else?