Question: I have a [Dell laptop D530](http://en.wikipedia.org/wiki/Dell_Latitude#Latitude_D5x0_series) with a 2.2 GHz [T7500 processor](http://ark.intel.com/Product.aspx?id=29761).

What's the fastest processor upgrade I can put in this laptop?

Answer: 
Intel® Core™2 Duo Processor

Up to T7700 (2.40 GHz, 4 MB L2 Cache, 800 MHz FSB).

[Source](http://www.dell.com/us/en/corp/notebooks/latit_d530/pd.aspx?refid=latit_d530&s=corp)
Just a comment on the D530 CPU, it uses a ZIF socket secured to the motherboard with a cam screw so it should be easily replaceable.