ECC support

[Jim Thompson]

> On Sep 15, 2015, at 5:10 PM, Don Lewis <truckman at 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.

“Kabini” (“G-Series 2.0” aka GX-210 / GX-415/420) supports a single channel of ECC ram.

Honestly, at the densities used by some of these boards, ECC doesn’t make much sense.
(Obviously, if you’re running storage appliance, this position is reversed.)