Hi, this is my first post here. I'm italian, so i hope that i can explain the situation correctly. I bought a Samsung 830 SSD for my 13" Macbook Pro Early 2011. I've installed that instead of Superdrive unit, using a Leicke caddy (Optibay was too expensive). No problems during the installation, thanks to the iFixit guide. After installing Lion on the SSD, the system has become very fast. I've enabled TRIM and programmed a shutdown of the HDD after 1 minute of inactivity. Everything seems good, even the battery life seems good at first look. I've recently installed Mountain Lion GM, upgrading from Lion. I re-enabled TRIM and the 1 minute shutdown for the HDD. And here comes the problem. I've noticed that the fan (the left fan, i suppose, because the 13" has only one fan) has becomed crazy, and because of that, there is a massive battery drain. Sometimes the fan reaches 3500+ RPM even if CPU isn't working hard, like during navigation or text editing. This is strange and i don't know if the problem is Mountain Lion, the Samsung 830 (which hasn't temps sensor) or the HDD+SSD config. I've resetted SMC and PRAM but nothing happens. What shall i do? Please, help me!