The Dell Precision 450 is based on dual Xenon processors. What is unclear to me is whether the computer will support a 64 bit OS such as XP Pro 64. I note it is not on the list of Dell supported OS's but would like to check just to be sure.
More aboutwill computer
Should be fine. Not much point unless you have over 4Gb of RAM though.
Would you happen to have the processor model number?
And I don't think that system can have more than 4GB of ram, so 64 bit wouldn't really be worth it.