I need help for upgrade

Can someone help me please : i want to upgrade the cpu on my laptop (its not souder to the board ) i will go from i3 2370m to i5 2450m or i5 3230m or any i7 that are between 2,5 ghz to 2,7 ghz  . info : i am on the chipset HM76 and socket PPGA988/FCPGA988/

please help me soon i need info

That's a bit risky, since it really depends if the manufacturer's bios supports a newer generation i5 or i7.

Also, cooling might be a problem as well.  Going from a mobile i3 to an i7 would be a very large increase in heat output, which the cooler may have trouble handling.

but  the 2 i5 will it be ok (i am not very good with laptop or bios that is inside h20 bios ) and which i5 will it be better for gaming ? low gaming

http://ark.intel.com/products/72164/Intel-Core-i5-3230M-Processor-3M-Cache-up-to-3_20-GHz-rPGA, http://ark.intel.com/products/53452/Intel-Core-i5-2450M-Processor-3M-Cache-up-to-3_10-GHz

Either of those i5's will be fine provided the cooler is sufficient - sometimes if a range of laptops runs with just i3's the cpu cooler is a turd. Replacing the cpu with a stronger one = high temps. I certainly wouldnt risk running an i7.

HD4000 vs HD3000

http://compare-processors.com/hd-graphics-3000-vs-4000-gaming/5680/

I'd check the laptop series. What does the high end model in the line up have in it and grab that. Hopefully it works. 

will it be compatible with this model of laptop sony vaio sve15112fxs  

m'y cooler Is sufficient but m'y bios i dont know if it ok with the new proco i have Inside h2o bios Will it be compatible with i5 3230m

my cooler Is sufficient but m'y bios i dont know if it ok with the new proco i have Inside h2o bios Will it be compatible with i5 3230 m

please answer soon i found a good one