From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1SI0hj-00059o-F3 for garchives@archives.gentoo.org; Wed, 11 Apr 2012 16:47:41 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0BD11E0C01; Wed, 11 Apr 2012 16:47:06 +0000 (UTC) Received: from mail-bk0-f53.google.com (mail-bk0-f53.google.com [209.85.214.53]) by pigeon.gentoo.org (Postfix) with ESMTP id DBD37E093B for ; Wed, 11 Apr 2012 16:45:41 +0000 (UTC) Received: by bkwj4 with SMTP id j4so973113bkw.40 for ; Wed, 11 Apr 2012 09:45:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=WkpT2F6NJ+87jFe4DH7ecpD0pMOwM9SR0z8615uOtOQ=; b=LojTvhqxrykKpxheuMrNYwWCxHwiWcWnnVX2wtLuanZgNtCZc+QNRCbAxN/DTOZ4cr t1jCOr4ehtjaS487YhKwcKrcnTtE2VOGUseDocdxRiZB+OPRcLzmolQrU9++IGSMGpef +BdR2vrXYwXblQXe84ounQ39O4vKxz/3vVbwB1cSpFcVTL7/xuO6bkIW7DZiKqRCljEl ts1AUwpRSPYFe7zLy0qOPH+07HKX/qnfR6zGn2CiPP5Bin0bUFojF0j1pMsCZmLGoGkq pAug324RQpeQlqmqZaFNex5hC1fStDPihQ+3tW2arax37AzRMUNVgBSR+sLQ0bQ2FGEh /E7g== Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.205.125.142 with SMTP id gs14mr6364199bkc.95.1334162740970; Wed, 11 Apr 2012 09:45:40 -0700 (PDT) Received: by 10.204.164.76 with HTTP; Wed, 11 Apr 2012 09:45:40 -0700 (PDT) In-Reply-To: <3590552.QJNIKWnFeQ@energy> References: <20120410112621.GA10304@waltdnes.org> <271B3943-DE38-4A2B-B056-0A1BD1712956@stellar.eclipse.co.uk> <20120411061135.GA11539@waltdnes.org> <3590552.QJNIKWnFeQ@energy> Date: Wed, 11 Apr 2012 12:45:40 -0400 Message-ID: Subject: Re: [gentoo-user] PCI video cards, hardware accel, upported by open-source drivers? From: Michael Mol To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: 65c07c29-a7ee-4910-894e-4e91c1df1c26 X-Archives-Hash: f8d93864f45cf3ff15ac3da93039ec11 On Wed, Apr 11, 2012 at 12:30 PM, Volker Armin Hemmann wrote: > Am Mittwoch, 11. April 2012, 02:11:35 schrieb Walter Dnes: >> On Tue, Apr 10, 2012 at 06:45:55PM +0100, Stroller wrote >> >> > I'm sceptical over the benefits of upgrading a 4 year old PC (short >> > of ripping most all the guts out and starting again). I know the >> > industry has currently settled on PCIe, but haven't bus speeds >> > increased in the last 4 years? Are all the latest cards compatible >> > with your Dell? If not, then you'll probably end up buying an older >> > model, and then that will be sub-optimal when you want to upgrade >> > your motherboard in a year's time. >> >> =C2=A0 I've posted a snapshot of the Dell's internals on my ISP's person= al >> webspace at http://clients.teksavvy.com/~walterdnes/misc/dell2.jpg =C2= =A0Is >> the long black slot PCIe? =C2=A0What's the short black slot? >> >> > I'm sorry if this reply is unhelpful, but you give a lot of informatio= n, >> > and perhaps that means you might be open to considering alternative >> > solutions to the core problem. >> >> =C2=A0 If it's PCIe, so be it. =C2=A0Actually, a post that prevents me w= asting >> money is helpful . =C2=A0Would PCIe be significantly better on the sa= me >> CPU+GPU, or is it hype? > > a lot, lot lot lot better. No hype. One thing worth noting about the difference between PCI and PCIe: PCI typically has all devices on the same bus, or on bridged buses. Traffic from one device at a particular instant means another device can't communicate until that first device is done. That means your PCI video card competes with your PCI hard disk controller and your PCI USB card for bandwidth. Two high-throughput devices like DMA-enabled video cards and disk controllers will get in each others' way. With PCIe, the data channels (called lanes) are electrically distinct; your video card and RAID card both communicate directly with the PCIe controller, and don't have to wait for a clear channel from each other before they can talk. *Logically*, PCIe looks like PCI when you run lspci or similar. At the hardware and electrical levels, though, they're quite different. --=20 :wq