Swap P8400 for P9500

[VirtuaTekken]

If I decide to swap CPU in the future, would I need a better cooling system or will heat pretty much be the same?

[robamb2002]

the p8400 and p9500 have the same archetecture and have the same thermal envelope so they would be interchangeable without any modifications to your cooling

http://processorfinder.intel.com/details.aspx?sSpec=SLB4E
http://processorfinder.intel.com/details.aspx?sSpec=SLB3R

hope that helps :)