Yes. I am sure you will not have problems. But as my calculation shows you will barely have an advantage as well. I read several sources about memory usage of 64 bit. And many show that addressing and CPU instructions use about 40 percent more memory.

I also read that the 64-bit version of the game "Crysis" was not faster than 32-bit. They told that it actually was faster but the longer addressing slowed it down at the same time. So it was the same like 32-bit at the end.
And Crysis does not use more than 2 GB RAM (32 and 64-bit).