The i7 is a 64 bit processor.
No , you cannot change the CPU on any laptops
Yes, they function with the same processor.
Currently the i7 is the best processor you can get, if you have the money to spend on one I suggest that you do.
the i in i series processor stands for ITANIUM. so the full form of i7 is itanium7
Intel i7 processor
I7 Processors use socket LGA775.
At this point it would be I7-3930K or I7-3960X.
Depends on the processor.
Irdk
I7
Lenovo y580 i7