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Date: Tue, 15 Sep 2015 18:17:43 -0700 (PDT)
From: Don Lewis <truckman@FreeBSD.org>
Subject: Re: ECC support
To: jim@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.