Date: Wed, 22 Mar 2017 16:26:07 -0700 (PDT) From: Don Lewis <truckman@FreeBSD.org> To: avg@FreeBSD.org Cc: freebsd-amd64@FreeBSD.org Subject: Re: FreeBSD on Ryzen Message-ID: <201703222326.v2MNQ7o1030213@gw.catspoiler.org> In-Reply-To: <4d09dde2-fef3-ac41-9d3a-6567c9b04029@FreeBSD.org>
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On 23 Mar, Andriy Gapon wrote: > On 03/22/2017 22:30, Don Lewis wrote: >> I've got ECC RAM, but unfortunately the motherboard I'm using doesn't >> enable ECC. > > Are you absolutely sure of that? Yes. The motherboard is a Gigabyte GA-AB350 Gaming. On the motherboard specification page it specifically says: Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules (operate in non-ECC mode) and there are no knobs in the BIOS to enable ECC. I was hoping to get lucky though because the memory support list has an entry for the RAM that I purchased with a checkmark in the ECC column. I've got some older Gigabyte AM2 - AM3+ boards that support ECC even though it is not mentioned anywhere in the spec. I have heard rumors that some other motherboards silently support ECC if they detect it even though they don't have any mention of it in their BIOS configuration screens. To check this I installed the latest version of Fedora rawhide and there was no indication of ECC support in the boot messages, edac-utils didn't find it, and dmidecode said that the memory was 64 bits wide and not 72. > Could you please share dmesg from a verbose boot? > At least the portion where CPUs and topology are described. > Thanks! Yeah, I can send that later when I have a chance to reboot the box.
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