From owner-freebsd-hardware Tue Feb 4 11:47:36 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id LAA07831 for hardware-outgoing; Tue, 4 Feb 1997 11:47:36 -0800 (PST) Received: from pegasus.com (pegasus.com [140.174.243.13]) by freefall.freebsd.org (8.8.5/8.8.5) with SMTP id LAA07812 for ; Tue, 4 Feb 1997 11:47:30 -0800 (PST) Received: by pegasus.com (8.6.8/PEGASUS-2.2) id JAA06691; Tue, 4 Feb 1997 09:47:09 -1000 Date: Tue, 4 Feb 1997 09:47:09 -1000 From: richard@pegasus.com (Richard Foulk) Message-Id: <199702041947.JAA06691@pegasus.com> In-Reply-To: asami@vader.cs.berkeley.edu (Satoshi Asami) "Re: 64 MB ECC or 128 MB non ECC ?" (Feb 4, 4:05am) X-Mailer: Mail User's Shell (7.2.5 10/14/92) To: freebsd-hardware@freebsd.org Subject: Re: 64 MB ECC or 128 MB non ECC ? Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk } * From: roberto@keltia.freenix.fr (Ollivier Robert) } } * One thing to consider is that you'll suffer a 10-15% speed penalty with ECC } * RAM. (number from some -hardware mails in the past). } } To clarify: 10-15% penalty on maximum memory bandwidth. (E.g., 70MB/s } vs. 64MB/s on TritonII with 66MHz bus and P5-133.) } } This is NOT the same as application speed penalty, which obviously } varies depending on how memory-intensive it is. } That's kinda what I thought. So closer to 1%. Richard