Hello All, I'm an Engineering college student, and I own the first generation unibody macbook pro from October 2008 (known here as Late 2008 Model). Its the 2.4Ghz, 9400/9600 GT, 2GB RAM, 250GB HDD Model. As I said above I'm an engineering student so I use stuff like MATLAB, Eclipse (Java IDE), Xcode, SOLiD, iTunes, etc a lot. I generally have a a few word files, a few excel files, a bunch of matlab files, mail, safari with like 10 tabs, iTunes and a lot of other stuff open. As you may imagine my mac cannot handle this. I have a Page In / Out Ratio as follows: 2.5 Million to 750,356. And a swap file of 1.4GB/2GB. I recently came across the deal of Mushkin RAM for $64.99 from newegg. I definitely want to take advantage of this before its gone. The problem is that the 2X2GB and 1X4GB sticks both cost the same. I realize if I purchase the 4GB stick, I will have 5GB total and though that is 1GB more ram I will lose dual channel. My question is, given my needs will the loss of dual channel be compensated by the extra 1 GB of RAM? Links: (Note the rebate make it $64.99) 2X2GB: http://www.newegg.com/Product/Product.aspx?Item=N82E16820226019 4GB: http://www.newegg.com/Product/Product.aspx?Item=N82E16820226020 Thanks a lot for your help guys! Best.