Comment 14 for bug 1137817

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Chris Wilson (ickle) wrote : Re: [ivb] System freeze after high memory usage

So not rc6 related - that rules out the most likely suspect for the GPU. Let the machine run memtest overnight or over the weekend, just to rule a bad stick of memory. Then if you have VTd enabled, intel_iommu=off will be useful to test, and perhaps pcie_aspm=off.