Soleron on 05 October 2009
Some applications will actually see a decrease in performance, because 32-bit variables will still use 64 bits of address space. I think +10% on average is overstating it. Maybe +5% for designed-for-64-bit apps, no change on most apps and -5% on a very few apps that suffer the above problem.
Also make sure your drivers work fully in 64-bit. They should by now, but there are a few obscure devices that have problems.
