Originally Posted By: adam123
Windows XP 64 was basically a rushed deal, alot of drivers till dont support it, some software refuses to run on it. As a result of this it has never been all that popular and now with XP in the Extended support phase this is unlikely to change. If you testing the waters for 64bit I would encourage you to test the new Windows 7 , or Vista O/S's out. 64 bit programs do take more memory but not as much as what some believe. It will depend heavily on the number of pointers used in the software that your running. More pointers more memory addresses to keep track of and since your double the memory space assessable you end up taking twice the size. This is only the adresse to that memory though, and not the information that you wish to store inside of it, so typically a memory usage increase of ~10-13% is typical in my experience.
Hope this doesn't ramble too much. (Night Shift last night)
XP 64 IS Server 2003 x64. With an XP GUI on it and looser default security settings. There is still plenty of support for it. The problem is support for consumer-level devices, which due to the server OS base of the operating system, always has, and likely will remain quite limited.
That being said, I have a number of boxes running it, and with a little work, no driver issues, even for some legacy hardware.