From owner-freebsd-questions@FreeBSD.ORG Thu May 4 18:11:37 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F1AAF16A408 for ; Thu, 4 May 2006 18:11:37 +0000 (UTC) (envelope-from wmoran@collaborativefusion.com) Received: from mx00.pub.collaborativefusion.com (mx00.pub.collaborativefusion.com [206.210.89.199]) by mx1.FreeBSD.org (Postfix) with ESMTP id ED8CF43D49 for ; Thu, 4 May 2006 18:11:36 +0000 (GMT) (envelope-from wmoran@collaborativefusion.com) Received: from localhost (monrovll-cuda1-24-53-251-44.pittpa.adelphia.net [24.53.251.44]) (AUTH: LOGIN wmoran, TLS: TLSv1/SSLv3,256bits,AES256-SHA) by wingspan with esmtp; Thu, 04 May 2006 14:11:34 -0400 id 00056407.445A43D6.0000A4C3 Date: Thu, 4 May 2006 14:11:31 -0400 From: Bill Moran To: Charles Swiger Message-Id: <20060504141131.20d3ef96.wmoran@collaborativefusion.com> In-Reply-To: References: <9c8168780605040928j3c57ec2dne835d4f449abbfab@mail.gmail.com> <9c8168780605041025u234c4cd2s4191a6eacb0de9ad@mail.gmail.com> Organization: Collaborative Fusion X-Mailer: Sylpheed version 1.0.6 (GTK+ 1.2.10; i386-portbld-freebsd5.4) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: kep.woof@gmail.com, freebsd-questions@freebsd.org Subject: Re: which graphics card? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 May 2006 18:11:38 -0000 Charles Swiger wrote: > > Are you saying that it just means you can address more memory? > > No, the CPU registers and the address bus can be wider (not just the > memory bus) with Intel EM64T or AMD64 architectures, and can get more > work done per clock for some tasks, but can also be slower for some > common tasks, too. > > Again, if you have more than 4GB of RAM, using the CPU in native 64- > bit mode is probably the way to go; if you've got less, using the CPU > in 32-bit mode might very well work better, but it really depends > upon the type of processes you run. In our experiments, we found that a 32-bit PAE kernel allowed us to access all the memory we had in the machines, and performance was better than a 64-bit kernel. -- Bill Moran Potential Technologies http://www.potentialtech.com