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 ------------------------------------------------------------
gjgowey at tmo.blackberry.net
2007-Sep-01 03:07 UTC
[CentOS] OT: 4 dual cores agains 2 quad cores
I'll take a stab at it, but I'm only hypothesizing (aka no proof). I would think the quad duals would be faster because of it being easier to dissipate the heat (should be less per chip). However, if you get a really industrial strength liquid cooling system for the two quad's then they'll probably be faster because of the faster clock speed of the cores. Geoff Sent from my BlackBerry wireless handheld. -----Original Message----- From: "Erick Perez" <eaperezh at gmail.com> Date: Fri, 31 Aug 2007 21:51:17 To:"CentOS mailing list" <centos at centos.org> Subject: [CentOS] OT: 4 dual cores agains 2 quad cores 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 at centos.org http://lists.centos.org/mailman/listinfo/centos
Hi, performance measurement is always strongly dependent on the kind of computation you are performing. So to really find out, you need to do benchmarks with the programs you want to run. If the price is not important, I would buy four quad cores with each 3GHz per server. Regards, Sebastian Erick Perez wrote:> 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. > > >
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 ?crit :> 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 at centos.org > http://lists.centos.org/mailman/listinfo/centos >
On Friday 31 August 2007, Erick Perez wrote:> 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.If you do pure IO workloads, the 4 dual cores are probably going to be as fast as the 2 quads because of the clock differences. For CPU bound workloads, the quad cores will beat the duals easily because of the higher clock speed (and more efficient caching in case of AMD). The only other things I would worry about is the number of memory slots. Usually boards that have 4 cpu sockets have a larger number of memory slots too. So if you need lots of ram, you're better off on that. Peter.