Hey guys I have the early 2011 15' MacBook Pro running 2.3GHz Intel Core i7 (Quad Core). It came with the standard 4 GB 133 MHz DDR3 configuration. I've noticed that I've been running near 4 GB while doing daily tasks especially when browsing a video which seems to take up a lot of memory. Anyways I'm going into engineering for school and was considering upgrading to 8 GB of RAM for the sake of speed and multitasking. I am new to all of this so I dont know which brands are good and whether or not the 8 GB will make much of a difference. Any suggestions?