What are the advantages/disadvantages of using one over another (in a 64bits CPU),for someone that uses the computer for: - browsing the web - see movies and listen to music - occasionally use of office software, pdf reader... Assume 4GB of RAM, and a Linux distro as O.S. When i google for the subject i find people saying that for the average home user, 32bits is the better choice because of compatibility, and because the gain in processing speed by using a 64bits OS will be unnoticeable for that kind of user; in the other hand i see all kind off benchmarks showing that 64 bits O.S is faster... so using 64bits offers any advantage for the kind of user mentioned? Will the use of 32bits O.S generate less heat because it uses less of the 64bits CPU resources? Also why 64bits distros have higher system requirements? Considering that most distros offer 32bits and x64bits versions, what are yours thoughts? Thanks!