|
Fundamentally it comes down to I/O performance between the CPU cores and memory bus. 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 There are articles here worth a read: http://www.tomshardware.com/2006/09/10/four_cores_on_the_rampage/ As has already been mentioned, if you have four sockets to fill you might as well fill it with Quad cores anyway.... You might find this useful too: http://www.tomshardware.com/2007/08/08/extreme_fsb_2/ Regards Pete David Amiel wrote: 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 : http://www.spec.org/cpu2006/results/cpu2006.html 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 :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 ------------------------------------------------------------ _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos_______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos |
_______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos
