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Virtual PC with Intel XEON vs Intel Pentium D

We have a machine that is being configured to run 3-4 instances of virtual PC, which must run well. 32bit OS, both guest and host.

Now the question is to go with Xeon dual core 3ghz or pentium D dual core 3 ghz


there is a difference in pricing, but I am trying to see if it worth paying extra and getting the xeon ?
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shankshank
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shankshank
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2 Solutions
 
CallandorCommented:
The Pentium-D will actually be better in many situations, especially if you are using the Presler core (900 series): http://www.pugetsystems.com/articles.php?id=23.  You will also save money on not needing a dual socket motherboard nor ECC registered RAM.
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shankshankAuthor Commented:
wait wait, both machines are dual core, but one is the xeon
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zephyr_hex (Megan)DeveloperCommented:
there is a difference between dual core and dual cpu.
xeon = dual cpu, and thus require the dual socket motherboard
pentium d = dual core.  one cpu, two cores.

you should also consider that the majority of applications can not run on dual cpu's.  (well, they will run, but only on 1 cpu).
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CallandorCommented:
The dual core Xeon has twice the cache and adds hyperthreading, so it is better performance wise.  The downside is that it is based on the old 90nm process and runs hot.  See http://www.gamepc.com/labs/view_content.asp?id=paxville&page=1
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zephyr_hex (Megan)DeveloperCommented:
let me clarify : the majority of applications can not run on dual cpu's or dual cores.  (they will run, but only as 1 thread through a cpu or core).  you should check the major applications you will be using to see if they support multi-threading.

this article should help : http://www.pugetsystems.com/articles.php?id=23  .  it gives a direct comparison between the pentium d and xeon.
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shankshankAuthor Commented:
Callandor: so it won't matter if I am running 32bit, the xeon will be better choice?

zephyr: with the pricing I am going to get dual core regardless, because I am running virtual pc images and dual core seems the best option, i am just unaware if the price jump is worth for the xeon type dual core
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shankshankAuthor Commented:
update the xeons are def dual core so i don't need dual socket board

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willcompCommented:
At this point, dual core Athlon 64 and Opteron CPUs have superior performance.  If your client can wait a bit and really needs maximum performance, you would be well served to wait until Intel releases the Conroe CPUs.
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CallandorCommented:
It won't matter whether it is 32-bit or not - larger cache and hyperthreading help whenever more cpu power is needed.  Even 32-bit applications like video and audio encoding benefit from multiple cores and hyperthreading.
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