E6420 processor upgrade - fastest possible?

Hello Dell Forums,

I have a question that I hope one of you can help with ... It is which processor would be the fastest one to upgrade my Dell E6420 with? I'm considering this one:

ark.intel.com/.../Intel-Core-i7-2670QM-Processor-6M-Cache-up-to-3_10-GHz

however, if possible would like a higher base frequency while retaining the No. of cores and 6 MB cache or higher. Anyone have experience with what is possible - maybe a newer generation i7 fits in and works reliably (which is mandatory)?

Also, is it possible to put in RAM that works at a higher speed than the specified speed (1333 MHz)?

Anyone have experience with this? Thanks for any insights :emotion-1:

Jesper