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#41
No it does not require more ram instead x64 was designed to be able to use more ram per application.
32bit limit is 2gb (can go upto3gb) per application
with x64 bit you don't have this limit at all if your software are x64bit too, each application can use as much ram available right upto 128GB.
I tested a machine with 16gb running 4 graphics application & each of them was able to use 3-4gb of ram.
Installing on your laptop should be fine with3gb ram at least you will be able to experience the speed of windows 7 which is quite in news.