Battery life and performance question

Hadn't really noticed until I looked at the build sheet that the 9100's come with a 2.8E (Prescott) cpu.

These generate more heat and use more power then the northwood cpu's.

Anyone tried putting in a Desktop Northwood or Mobile P4 (available up to 3.2ghz in mobile format) and seeing how it affects battery life and performance?

Just trying to get my mind off the screen issues

- Jim

From http://docs.us.dell.com/docs/systems...al.htm#1000001

Follow the instructions in "Preparing to Work Inside the Computer."
Remove the left, right, and center hinge covers.
Remove the keyboard.
Remove the display assembly.
Remove the keyboard bracket.
Remove the video card.
Loosen in consecutive order the four captive screws, labeled "1" through "4," that secure the microprocessor thermal-cooling assembly to the system board.

Lift up the microprocessor thermal-cooling assembly and remove it from the system board.

Doesn't look too hard. Don't know about warranty's, should be fine as long as you don't break anything in there.

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Not sure where to get the higher speed p4 mobiles, but found this intel spec sheet with the OEM order number on it.
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Mobile Intel® Pentium® 4 Processors Return to list
Results
sSpec Number SL77R
Processor Frequency 3.20 GHz
CPUID String 0F29
Package Type
478 pin PPGA Core Voltage
1.300
Bus Speed
533 MHz Thermal Guideline
76.0W
Core Stepping
D1 Thermal Spec
100°C
L2 Cache Size
512 KB Manufacturing Technology
0.13 micron
L2 Cache Speed
3.20 GHz Bus/Core Ratio
24
Spec Update

http://developer.intel.com/design/mo...umentation.htm
Product Order Codes

OEM Order Code
RK80532HE088512

Notes
This processor includes Hyper-Threading Technology.
This processor includes enhanced Intel SpeedStep® Technology.