I have the 2.3 w/ 8 gigs RAM, and I know people that have the 2.0 and 2.2, and NONE of them run nearly as hot as the dual core MBPs we have replaced. The original Core Duo MBPs were ridiculously hot and the Core 2 Duo ran cooler. Just because a chip is more capable does NOT mean it runs hotter. It may have the potential to get hotter, but it appears it can do more tasks with less total utilization. For the exact same tasks being run on my current MBP versus previous, the percent of the CPU being used is far less on my 15. I am currently: -On the Internet (12+ windows w/ multiple tabs in each open in FireFox) -Live Streaming Music Vids (HD I think, Taio Cruz baby!) -Running SPSS and actively doing regression analysis -Word -PowerPoint -Excel -iTunes -iChat -Mail -13 Widgets -iPhoto -Paintbrush -More crap SPSS and FireFox total about 1.3 to 1.75 GB RAM...SPSS is a resource hog. Excel is a resource hog with what I am doing. In my C2D MBP 13, the temp would be go up to 205 F before the fan would kick at 6,000RPM and bring it down to 165-70. It would stay at that until the video was not being played and SPSS was not actively being used to make computations. CPU percentage use would be at least 25% up to 90% and the CPU was constantly running at a high percentage and you could hear it 'thinking'. My 2.3 2011 MBP15 CPU percentage has not went over 15% when actively computing statistics using the SPSS Processor. The current CPU use with the above programs running, including a video live streaming is under 5% and 95% + remains Idle. Most of the time it sits at 2% with the above running. The fans are chillin' at 1998 RPM and have not gone up for the last 12 hours the computer has been on and been actively used. So how hot is the CPU? 124-137 F. And it is sitting on my BED. The GPU and 'sinks run about 10-25 F cooler. This is actually the coolest running CPU I have owned within at least the past decade. When running SAS the difference is even more impressive given many SAS systems are ridiculous computer killers. Pics or Shens? Indeed. Now that I am also video conferencing it hit 151 F...OMG guys is my MBP overheating?