| This has been asked several times, so I'll try and paraphrase it one more time.
The software available today in the 64-bit arena doesn't yet take full advantage of the new features present in the X86_64 architecture, so there's really no serious performance difference between running 64-bit or 32-bit applications on those processors.
On the other hand, there are some pieces of software (for instance Macromedia's Flash plug-in) that simply do not have a 64-bit version yet, so you'll end up having to install a 32-bit browser to install the 32-bit extension.
In conclusion, I recommend sticking with a 32-bit OS on your 64-bit CPU for the time being, until the software developers start to take advantage of the new features available. Hopefully since 64-bit Linux has been out for several years now and 64-bit XP is just now out, this will promote more 64-bit-specific development. |