Advantages of a 64 bit system

Question

From a developer perspective i am trying to understand , what is the selling point of a 64-bit system ?

I understand that more registers are at your disposal , more

Answer 1

Sorry, I kept this a bit list style, and avoided not mentioning increased memory addressing and more which had already been mentioned.

a) You'll have double the amount of registers, actually giving you three times the amount of registers at you disposal. b) General purpose registers are increased from 32 to 64 bit, meaning processing of 64 bit integers (i.e.) will be faster. c) More efficient position independent code since data can now be referenced relative to the RIP register. d) No-execute bit making the system more tolerant towards buffer overflows.