Hi All, Just want to throw this out there. Got my 2011 iMac 27" SSD last night, and it crashed every 3 minutes. Quickly looked up online for a solution, and here is what I did. Do a PRAM reset and install the latest updates. You do a PRAM reset by 1. turning off your imac 2. turn on your imac 3. press and hold command-option-P-R (all 4 keys) before the gray screen comes up. 4. The computer will restart and give you a bong sound a second time. 5. Install the latest software updates after restart. No problem ever since. Was worried I had to send this back.