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Fundamentally it comes down to I/O performance between the CPU cores
and memory bus.<br>
<br>
Quad core CPUs suffer from performance bottlenecks with regard to Dual
cores which leads to a less of an improvement than one might expect
from clock speed alone<br>
<br>
There are articles here worth a read:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.tomshardware.com/2006/09/10/four_cores_on_the_rampage/">http://www.tomshardware.com/2006/09/10/four_cores_on_the_rampage/</a><br>
<br>
As has already been mentioned, if you have four sockets to fill you
might as well fill it with Quad cores anyway....<br>
<br>
You might find this useful too:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.tomshardware.com/2007/08/08/extreme_fsb_2/">http://www.tomshardware.com/2007/08/08/extreme_fsb_2/</a><br>
<br>
Regards<br>
<br>
Pete<br>
<br>
<br>
<br>
<br>
David Amiel wrote:
<blockquote
cite="mid:2109.192.168.69.82.1188636056.squirrel@192.168.69.1"
type="cite">
<pre wrap="">Hello,
to my mind the most impacting on a SMP server is the synchronisation time
between dies/cores. the time to synchronize 2 cores on different dies is
higher than the time to synchronize 2 cores on the same die. So to achieve
best performances you have to limit number of dies.
So a dual quad core should be more powerful than a 4 dual core.
You can verify this here : <a class="moz-txt-link-freetext" href="http://www.spec.org/cpu2006/results/cpu2006.html">http://www.spec.org/cpu2006/results/cpu2006.html</a>
results on a 2 chips server are ~20/30% higher than a 4 chips using the
same processor
regards,
David Amiel
Le Sam 1 septembre 2007 04:51, Erick Perez a écrit :
</pre>
<blockquote type="cite">
<pre wrap="">Hi people,
Do you have pointers to web documents that help me make comparisons
between buying a server with two quad core 2.33 ghz or buying a 4 dual
core 2ghz server?
I am trying to answer a question of performance. It is not important
the redundancy/failover or the price of the server. Just the
performance.
obviously all the hardware specs are the same, the question is the CPU.
--
------------------------------------------------------------
Erick Perez
Panama Sistemas
Integradores de Telefonia IP y Soluciones Para Centros de Datos
Panama, Republica de Panama
Cel Panama. +(507) 6694-4780
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