Date: Wed, 24 Jan 2018 12:24:48 +0000 From: Mike Pumford <michaelp@bsquare.com> To: freebsd-stable@freebsd.org Subject: Re: Ryzen issues on FreeBSD ? Message-ID: <bb9d9da0-e1c1-155d-5c80-db0f7f4a1388@bsquare.com> In-Reply-To: <CAMgUhprXtknTNxW63e5hVFPZP3ad6GbjLCwqe5N9hGbvxWm_tw@mail.gmail.com> References: <8e842dec-ade7-37d1-6bd8-856ea1a827ca@sentex.net> <3b625072-dfb3-6b4f-494d-7fe1b2fa554c@ingresso.co.uk> <2c6ce4dd-f43c-7c40-abc2-732d6f8996ec@sentex.net> <tkrat.6d8f44d87e74fa14@FreeBSD.org> <795dbb79-3c18-d967-98b9-5d09a740dbfe@sentex.net> <CAMgUhpr%2B5HeBi1MRegs=XoKpdHW8-i%2Bec0k-DNaL_pcN6PCPKw@mail.gmail.com> <tkrat.5ec856810e0c7ced@FreeBSD.org> <CAMgUhpqZyCOjqVhMCAi-b_JaKYtyfqDf0pOcX0LwV2dcTuusyg@mail.gmail.com> <CAMgUhpqpYpoi1bD9h_SYvh83g_Csky%2BqMkTsOYZ1zcHYxtMeHg@mail.gmail.com> <dd29d77a-deb9-423e-f9b8-cb07387bbfd5@sentex.net> <9b769e4e-b098-b294-0bce-8bb1c42e8a59@rootautomation.com> <a601973f-9205-8dd9-7f78-a7f03985ab4a@sentex.net> <CAMgUhpop3=J7TQimK2iHdGTc=hnTgCEZDqibDSRCyTPMWX5wJQ@mail.gmail.com> <CAMgUhprfSFv1268-MtQoMn%2BgD-DtOhR2-rnFsMHTgJrK0dop6Q@mail.gmail.com> <508a8c83-a449-3c5d-c3bf-b308d91c80c0@bsquare.com> <CAMgUhprXtknTNxW63e5hVFPZP3ad6GbjLCwqe5N9hGbvxWm_tw@mail.gmail.com>
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On 24/01/2018 12:11, Nimrod Levy wrote: > The RAM was detected by the MB as 2400. I didn't change it until I set > it to the slower speed. > I guess the Intel motherboards I have are more conservative then. They default to the standard RAM profile (slower than what it is sold as) and you have to explicitly enable the faster profiles (which do also come from data read from RAM). So it seems like your BIOS vendor is picking the faster profile as a default. I've got a couple of intel systems like this (one windows and one BSD) and neither ran stable with the faster RAM profiles. From what I read at the time 2133 is the official upper limit of the DDR4 standard. Any speed faster than that is an overclock profile. Mike -- Mike Pumford | Senior Software Engineer T: +44 (0) 1225 710635 BSQUARE - The business of IoT www.bsquare.com <http://www.bsquare.com/>;
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