Greetings Mac Rumors! I am about to attend my first week of university and im having second thoughts about the machine i own and wanted to push through school... Since new in late 2007 i have owned a white 2007, macbook 3,1. I have loved the machine. Its been a charm and has never ever failed on me. I have sunk some cash into it and now im debating if that was a good call of not. I posted here: http://forums.macrumors.com/showthread.php?t=1765582 About a massive upgrade i did. What im hurting about is for class i made a purchase of an authentic apple battery for the laptop which cost me $129.99 plus taxes. I also had the machine upgraded with a SSd which cost me another $120 plus taxes. However the SSD i can use in another machine.. Its just im debating on trying hard to push the machine through the next 4 years of my University life. But each time i do anything involving video the CPU fans spin up to 6200rpm and the battery drains. I had the CPU and GPU regouped but it still seems to struggle. Its perfect for my word documents and internet, but anything flash related it has a hard time. Running the 2007 White macbook 3,1 Intel Core 2 Duo T7500 @ 2.2ghz, 4gb DDr2 RAM, 240 gb Kingston SSD, intel X3100 graphics card.. So i want to know! How reliable is using ML post factor and having mountain lion on the system and is it worth keeping the battery in it? Or returning the battery and investing for a new 13' macbook pro.