I have an early 2011 MBP 15 8GB Ram, 500GB HD@7200 2 GHz Intel Core i7. the last over the course of the last 40-60 days I have noticed that I am getting the beach ball more and more and things are coming to a serious slow down on the my system. I also noticed that it doesn't seem like my fans are as active as they used to be. Since I am not a "power user" I just kind of wrote it off as I am not pushing the system that hard so they are just not spinning up, plus where I have the computer set up now it is closer to the A/C unit and I keep my room on the chilly side. Anyways, as the problems got worse I started searching this site for possible problems / solutions. I also opened the case and cleaned out a bunch of dirt and dust bunnies. While searching heat and fan issues I noticed a lot of people recommending iStat Pro so I downloaded it. Here is what it shows me. For reference temps are in Fahrenheit. Also these numbers were observed after the computer had been sitting idle for over 30 min and went up slightly while posting this info. HD: Macintosh 83 CPU 97 CPU Heatsink 85 Enclosure Base 77 Enclosure Base 2 77 Enclosure Base 3 76 GPU 88 Heatsink B 88 Mem Controller 85 Mem Module A1 135 Right Fan 2004 Left Fan 1997 My concerns are: 1. Should there be an additional Mem Module? The computer came with two 4MB memory cards 2. Is the temp of 135 high? 3. Could any of this be the cause of the beach ball / system slow down issues? Additionally, I have looked at the Activity Monitor during times of problems and when there is no problems....it looks pretty much the same. Nothing seems to be obviously eating up resources. It usually shows no Page Outs or Swaps used. Thanks in advance for any help.