Date: Tue, 15 Sep 2015 18:17:43 -0700 (PDT) From: Don Lewis <truckman@FreeBSD.org> To: jim@netgate.com Cc: dieterbsd@gmail.com, freebsd-hackers@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: ECC support Message-ID: <201509160117.t8G1Hhbq023239@gw.catspoiler.org> In-Reply-To: <9E71A23E-2563-43FC-89F2-8ECB098EAD63@netgate.com>
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On 15 Sep, Jim Thompson wrote: > >> On Sep 15, 2015, at 5:10 PM, Don Lewis <truckman@FreeBSD.org> wrote: >> >> On 15 Sep, Dieter BSD wrote: >>> Many of AMD's CPU/APU parts support ECC memory. Not just the top of the >>> line parts, but also many of the less expensive, less power hungry parts. >>> However, many (most?) of the boards for these chips do not support ECC, >>> or at least do not admit to it. They specify "non-ECC memory". >>> >>> Obviously there have to be connections between the memory controller and >>> the memory for the extra bits. Aside from a little extra time for the >>> board designer to add a few traces to the wire list, this would not >>> raise the cost of the board. Despite this I have read that some boards >>> lack the necessary traces. >> >> I don't think the current APU parts support ECC. My guess is that the >> current APU sockets don't have the connections to support it. > > The G-Series (such as the T40E used on the APU) doesn˙t support ECC. > > ´Kabiniˇ (´G-Series 2.0ˇ aka GX-210 / GX-415/420) supports a single channel of ECC ram. Interesting ... it's been a while since I looked. I think the primary sockets at the time were FM1, FM2, and FM2+, and the mobile sockets, and they didn't support ECC. AM1 motherboard ECC support seems to be pretty lacking, though.
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