Hey Brian, thanks so much for such a prompt reply and sharing your observation. I'm at Starbucks right now and can't fire up the game and copy and paste all temperature readings from istat (didn't bring the mouse). But as soon as I reach home, I'm going to do it and let you and everyone else know. you're right. There's been a huge heat improvement. I barely heard the fan noise while playing UT2004, while on the two-month old MBP, the sound could wake up my next door neighbor. I know I'm exaggerating a little, but the previous one was seriously hot and louder even when the game was running with most of the graphics settings set to medium, while i barely hear the fans even with all settings set to high.