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Get your mbp replaced, the cpu is clearly defective.
The CPU is doing its job just fine, I think you mean the cooling system is poorly designed/defective, which it isn't really. These machines run hot.
 
Not sure I really want to install these as I kinda like my fans staying at 2000rpm regardless of what I'm doing. One thing that drove me nuts about my Blackbook was the fans screaming like a banshee when all I was doing was watching a youtube video, for Pete's sake...
 
To my surprise my macbook pro 15 2.8 came with the update ! already installed.
Model Name: MacBook Pro
Model Identifier: MacBookPro5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.8 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP51.0074.B01
SMC Version: 1.33f8
Built week of 11/26/08 Shanghai China
;)

Very interesting. When was yours released?
 
my macbook pro seemed to be running much hotter after the update...used to run smoothly at around 50-60 degrees C and now SMC and istat are saying around 90 degrees C? whats going on here?
 
The CPU is doing its job just fine, I think you mean the cooling system is poorly designed/defective, which it isn't really. These machines run hot.

I've ran my unibody mbp both cpu's for 2-3 hours maxing them close to 95% and I've yet to see it go higher than 88-90 celsius. 103.. thats pretty way up there.
 
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