From owner-freebsd-hardware@FreeBSD.ORG Thu Aug 16 12:41:43 2007 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 81EA716A417 for ; Thu, 16 Aug 2007 12:41:43 +0000 (UTC) (envelope-from johan@stromnet.se) Received: from av10-1-sn2.hy.skanova.net (av10-1-sn2.hy.skanova.net [81.228.8.181]) by mx1.freebsd.org (Postfix) with ESMTP id 1269013C45B for ; Thu, 16 Aug 2007 12:41:43 +0000 (UTC) (envelope-from johan@stromnet.se) Received: by av10-1-sn2.hy.skanova.net (Postfix, from userid 502) id 70A2E384AE; Thu, 16 Aug 2007 14:21:52 +0200 (CEST) Received: from smtp4-1-sn2.hy.skanova.net (smtp4-1-sn2.hy.skanova.net [81.228.8.92]) by av10-1-sn2.hy.skanova.net (Postfix) with ESMTP id 545FD3849D; Thu, 16 Aug 2007 14:21:52 +0200 (CEST) Received: from phomca.stromnet.se (90-224-172-102-no129.tbcn.telia.com [90.224.172.102]) by smtp4-1-sn2.hy.skanova.net (Postfix) with ESMTP id F2DDF37E42; Thu, 16 Aug 2007 14:21:51 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by phomca.stromnet.se (Postfix) with ESMTP id B5C9FB826; Thu, 16 Aug 2007 14:21:51 +0200 (CEST) X-Virus-Scanned: amavisd-new at stromnet.se Received: from phomca.stromnet.se ([127.0.0.1]) by localhost (phomca.stromnet.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wtCWgPLwSeps; Thu, 16 Aug 2007 14:21:48 +0200 (CEST) Received: from [172.28.1.102] (jstrom-mb.stromnet.se [172.28.1.102]) by phomca.stromnet.se (Postfix) with ESMTP id 37C3FB824; Thu, 16 Aug 2007 14:21:48 +0200 (CEST) In-Reply-To: <20070815153800.GA28807@cons.org> References: <7A201B4E-9B61-4074-93B9-42BD23B35AA9@stromnet.se> <20070815153800.GA28807@cons.org> Mime-Version: 1.0 (Apple Message framework v752.3) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <4835BBD0-5FA9-4DE3-A60D-B7D04628B229@stromnet.se> Content-Transfer-Encoding: 7bit From: =?ISO-8859-1?Q?Johan_Str=F6m?= Date: Thu, 16 Aug 2007 14:21:46 +0200 To: Martin Cracauer X-Mailer: Apple Mail (2.752.3) Cc: freebsd-smp@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: Single Core2Duo Quadcore vs. two dualcore Xeon? X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Aug 2007 12:41:43 -0000 On Aug 15, 2007, at 17:38 , Martin Cracauer wrote: > Johan Strm wrote on Thu, Aug 02, 2007 at 10:41:13PM +0200: >> Hello >> >> I'm in the process of purchasing a new server. I'm currently looking >> at two Supermicro based options, one with a Core 2 Duo Q6600 Quadcore >> 2.4GHz 2x4MB (on a PDSMi+ board) , and another with two Xeon 5110 >> dualcore 1.6GHz 4MB (on a X7DVL-i board). > > Well, the 2.4 GHz will be faster than the 1.6 Ghz :-) Very true :) > > The FB-DIMMs are bashed by some for high latency and maybe that's true > if you use all slots. Personally I couldn't observe this, 667 MHz > FB-DIMMs perform about as 667 MHz unregistered for me. > > However, the 775 platform allows you to either buy 800 MHz memory, or > even overclock memory, so potentially you get much more memory > bandwidth if you require it. Overclocking a server doesnt seem like a good idea, for desktop its one thing but I'll rather keep my servers stable and secure than a little faster > > The dual 771 platform also allow much more memory. I find 8 GB to be > very tight these days. Yeah, from what I've understood thats the "strong" thing with FB- DIMM... Able to take much more memory.. The Xeon Quad core just got a major price reduction though, so now I'm looking at a dual quad xeon (with 5320, 1.68Ghz or 5330 2.0GHz) instead... The "default" mobo at the supplier (www.mullet.se) uses the X7DVL-i board, which takes 6 FB-DIMMs on two channels (max out at 16 gig).. But I'm thinking about getting the upgrade mobo instead, X7BDE, with 8 slots on 4 channels with max 32GB (and also full KVM features in the IPMI slot..) But I'm curious if this kind of platform will ever be able to use all this? Disk access, memory bus & cpu etc.. lets asume I max this system in the future with 32 gigs of mem and 8 2ghz cores.. Will I ever be able to use that much with a raid5 (or 10, whats the lists opinion on this? 5 or 10?) config on a PCI-X slot? I think the disks will be the limiting factor before the PCI-X is maxed out though.. But realistically, for a php,mysql,apache,java etc machine with a number of jails, i wonder if I will ever be able to use this much power or if I should aim lower and if the box gets too loaded I'll get another one.. Thanks for answers! :) Johan