My wife complains that her iMac 8.1 (early 2008) is running slow. That and the fact that I've read iMacs overheat easily given the limited space inside, thereby shortening its life, has led me to suggest I replace the hard drive with an SSD. Should accelerate lots of stuff and do away with the heat. Some questions before I proceed though: 1) what kind of 3.5" to 2.5" adapter do I need? There are different kinds and I hear that not all such adapters fit in all computers. 2) There are many discussions on the hard drive temperature sensor. Apparently the stock hard drive has a sensor built-in which SSDs don't. I read that most people just short the sensor cable, then use software to run the fan at a certain speed. I'd rather have the fan adjust itself automatically depending on the internal temperature. Isn't this possible any longer with an SSD installed? How about the other fans (CPU etc.)? Won't they react to temperature changes either? 3) Anything else I should keep in mind before going ahead? I haven't decided on which SSD brand/model to get. Personally I have a couple of Samsung 830 SSDs in my Mac Pro and chose them because of their proven reliability. Alas they're no longer available, but I prefer a reliable and long-lasting SSD instead of one which performs a little faster but needs replacing after a couple of years. I'm sure just about any SSD will give the performance boost she's looking for anyway. I see Samsung has released their "840 EVO" and Sandisk their "Ultra plus"; both price competitive units though I know nothing about what to expect when it comes to reliability or life expectancy. Suggestions?