CPU Compatibility for upgrading Dell Latitude E5400

[yak72]

I have a Dell Latitude E5400 with an Intel Core 2 Duo T7250. I would like to upgrade the CPU. According to CPU-Z,my socket is Socket P (47 and the baseboard is 0D695C,manufactured by Dell,though I could not find much information on that online. The computer runs Windows 10. I'm looking at the Core 2 Duo P8700 as an upgrade option.

1)Is the P8700 compatible? If not,what is?
2)How do I determine if a CPU is compatible?
3)How do I compare 2 processors and tell which is better? What numbers should I be looking at?

By the way, I do know it won't make much difference. It doesn't cost much, so I want to do it anyway.

 

[The Paladin]

well first thing that jump to me are the following things that could be a game crasher for you even if it is the same socket type

1. Lithography, T7250 is 65nm vs P8700 is 45nm
2. Bus speed: T7250 is 800 mhz vs P8700 is 1066 Mhz

those things need to be addressed by the motherboard specification (which I could not find)

refs:
T7250: https://ark.intel.com/products/31728/Intel-Core-2-Duo-Processor-T7250-2M-Cache-2-00-GHz-800-MHz-FSB-
P8700: https://ark.intel.com/products/37006/Intel-Core-2-Duo-Processor-P8700-3M-Cache-2-53-GHz-1066-MHz-FSB-

 

[The Paladin]

found a few quick google references to upgrading the dame/similar laptop and seemingly the difference of cpu isn't really worth it
http://forum.notebookreview.com/threads/cpu-uprade-in-dell-latitude-e5400.707396/

 

[william p]

Here are the builds for that.
http://www.userbenchmark.com/System/Dell-Latitude-E5400/1760
This shows what others are running and the relative performance. "Fastest" I see is an X9100.
An SSD will probably help more than anything else.

 

[yak72]

Here are the builds for that.
http://www.userbenchmark.com/System/Dell-Latitude-E5400/1760
This shows what others are running and the relative performance. "Fastest" I see is an X9100.
An SSD will probably help more than anything else.

Thanks for your help.
The X9100 has 45W TDP, currently the T7250 has 35W, will that make a difference?
If it does, how can I solve that problem?

 

[yak72]

well first thing that jump to me are the following things that could be a game crasher for you even if it is the same socket type

1. Lithography, T7250 is 65nm vs P8700 is 45nm
2. Bus speed: T7250 is 800 mhz vs P8700 is 1066 Mhz

those things need to be addressed by the motherboard specification (which I could not find)

refs:
T7250: https://ark.intel.com/products/31728/Intel-Core-2-Duo-Processor-T7250-2M-Cache-2-00-GHz-800-MHz-FSB-
P8700: https://ark.intel.com/products/37006/Intel-Core-2-Duo-Processor-P8700-3M-Cache-2-53-GHz-1066-MHz-FSB-

Thanks for your help.
Another thing I noticed was that the T7250 supports sockets PBGA479 and PPGA478 while P8700 supports sockets BGA479 and PGA478. Will that extra P make a difference?