I want to compare between this 2 processors

Intel® Xeon® Processor 5050 !!!!!
Xeon CPUs were - are - and the are going to maintain their place to the TOP !

You are comparing 2 CPUs which are build for different use , Xeon is 99/% used for servers , DualCore D is used 99/% in desktops !!!

thanks for replay

I know that Xeon i designed for servers

but as we can see , both Processors have 4MB of cache , 3GHz CPU speed and                         Dual Core                        

but Intel® Pentium® D Processor 930 have 800 MHz bus speed
while Intel® Xeon® Processor 5050 have only 667 MHz

so I want to know why one of them is better than the other

thanks with my best regarding

Here's the deal with Xeon processors:

aside from the fact that Xeons support multiple CPU's per board, Xeon CPUs are IDENTICAL to their desktop counterparts from the same series.  It's the same silicon, different package.  So the two processors you highlighted would yield the EXACT same performance -- tecnically speaking.

Now, here's why the Pentium D system would be faster for you.  Xeons are designed for servers, so reliability is more important than performance.  Therefore, Xeon-based chipsets are all going to force you to use buffered ECC RAM (FB-DIMMS).  Not only are FB-DIMMS more expensive than ordinary DDR2 memory, they are also connected serially (so there's no such thing as dual channel mode), and they must transfer 72 bits on a strobe instead of 64.  The extra 8 bits are the ECC parity info, which must be checked by the memory controller for each and every memory transaction.  That makes the memory performance of a Xeon-based system a bit lower than a comparable desktop system.  Note that these restrictions are a result of the chipset, not the processor.  But good luck finding a Xeon board based on a desktop chipset.  It happens every once in a while, but not very often.

Bottom line:  The two processors you highlighted are roughly identical performance-wise.  But the Xeon will lock you into more expensive, slightly slower memory.  Go with the Pentium D.

thanks cuziyq for your explanation

you said go to Pentium D

but , I wan't to add another thing that I will use the processor in production server

do you still advice me to choose Pentium D ??

thanks with my best regarding

here you can compare them :  http://www.cpubenchmark.net/index.php

>> I wan't to add another thing that I will use the processor in production server.

What do you mean?  What thing do you want to add?

I mean I will use this processor in production environment

this CPU will not be used in Desktop or workstation PC

this CPU will be a processor for production server



so , do you still rank Pentium D as a better choose ?

thanks with my regarding

>I will use this processor in production environment

For production environments, unless you have a small shop and can afford downtime for maintenance and replacements, real server components are usually the way to go.  You can use a desktop as a server, as long as it isn't critical that the system is up all the time and any outages don't cost the business large amounts of money.  Keep in mind this never just a cpu choice: in addition to the memory, you will have to select a server motherboard for the Xeon, because is has a different socket, and probably a server case with redundant power supplies.