I was asked this question today and frankly, I didn't know the answer. So I thought I'd post it here.... If you don't need to access greater than 4GB RAM, is there any benefit to running the 64-bit version of CentOS vs the 32-bit one? That's assuming, of course, that the target machine utilizes a 64-bit capable processor. I hadn't seen any noticeable difference, but I haven't done any benchmarking either. On a desktop machine, the 32-bit version seems preferable since there are closed source creature comfort apps that are not yet available in 64-bit land, correct? Cheers,