Windows Legacy OS forum

Question

What are Windows XP Professional hardware limitations?

by KingVivil / October 11, 2011 8:04 AM PDT

I know this OS is limited to 4 GB of RAM, but what about numer of CPU cores etc.?

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All Answers

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Answer
What I read is that it's not the cores
by Steven Haninger / October 11, 2011 9:07 AM PDT

XP can use processors regardless of how many cores are in each.

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Correct
by Jimmy Greystone / October 11, 2011 12:17 PM PDT

Correct. XP Pro, IIRC, is limited to 2 physical CPUs, but those CPUs can have as many cores as you like. Of course the XP task scheduler is not really well equipped to deal with the subtle differences between multiple CPUs and multiple cores, so the point of diminishing return tends to hit probably after dual core CPUs.

Despite all the crap Vista takes, Microsoft did make a very important under the hood improvement. The Vista task scheduler is MUCH better at dealing with multi-CORE systems as opposed to multi-CPU. There are subtle differences between them which can have a pretty profound impact on responsiveness of the system under load.

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