Messages in this thread | | | Date | Mon, 11 Jun 2012 13:05:57 +0200 | From | Johannes Stezenbach <> | Subject | Re: AMD FX CPU bug, not fixed by latest microcode? |
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On Mon, Jun 11, 2012 at 11:49:05AM +0200, Borislav Petkov wrote: > On Mon, Jun 11, 2012 at 10:43:18AM +0200, Borislav Petkov wrote: > > On Sun, Jun 10, 2012 at 09:24:13PM +0200, Boszormenyi Zoltan wrote: > > > I have an AMD FX-8120 boxed CPU in an ASUS M5A99X-EVO mainboard > > > with 32GB DDR3/1600 memory, running Fedora 17, upgraded from 16. > > > memtest86+ show no problems. > > Ohe other thing: if there's an option in the BIOS to disable the IOMMU, > can you do that and try reproducing the issue with IOMMU disabled?
Maybe not related, but I had bad memory in my Intel Core-i5 based system some months ago which resulted in rare crashes, usually manifested itself as g++ ICEs when compiling a mid-sized C++ project -- compiling a kernel with make -p4 showed no problem. Also memtest86+ didn't show the issue, so I tried memtest86-4.0a which claims to find more errors due to SMP support. An overnight run left me with a screen full of garbage and a crashed memtest86-4.0. I replaced the RAM anyway and the box was stable since then.
memtest86-4.0a is at http://memtest86.com/
The page claims: With a single CPU it is not possible to drive multi-channel memory controllers at full speed making it impossible to detect some types of errors
Maybe someone knowledgable could comment if this is true.
Johannes
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