I can say is coming from a 15" 2.4ghz SR mbp, this penryn 17" mbp 2.5ghz runs SO much cooler just a joy to use. At its most intensive tasks it just gets comfortably warm at most! Even the bar on top is not that hot either!!
I remember I googled like crazy trying to find out, how much cooler the Penryns are as to the SR mbp that I was using... and to my surprised it is THAT much cooler. Feels like finally I have a mbp that is cool enough to keep on my lap with hours of usage and without my palms getting so warm that it starts to sweat! My palms doesnt even get near sweaty anymore and that left speaker part gets warm at best as to the sr mbp's left top speaker area was freakin hot!
I remember I googled like crazy trying to find out, how much cooler the Penryns are as to the SR mbp that I was using... and to my surprised it is THAT much cooler. Feels like finally I have a mbp that is cool enough to keep on my lap with hours of usage and without my palms getting so warm that it starts to sweat! My palms doesnt even get near sweaty anymore and that left speaker part gets warm at best as to the sr mbp's left top speaker area was freakin hot!