Thinking to migrate to Vista X64(64 bit system) from XP 32 bit

[SUBMAN1]

Originally Posted by CaptainHaplo

In a way - your both right. Wowexec changes the calls and does protect memory allocation - in essence it IS emulation - but only on a very small scale. 32 bit OS's do the same for 16 bit apps. No big deal.

The key here is you get more thru 64 bit than just "extra addressable memory".

Again, you are you are both mildly right, except you don't get much more than just more addressable memory from a hybrid CPU.

Performance increases are non-existent and performance decreases are the norm, though as pointed out, it is a mild decrease that is probably not noticeable.

-S