Comment 4 for bug 578849

UPDATE: I suspected the grub reinstall getting things to work was a long shot in the first place and having it actually get me going was a fluke, especially when it didn't work a second time. Further investigation revealed the problem was having to manually set the BIOS to DDR3 1600 from the auto detected 1333 (which apparently is pretty standard at the present state of affairs). I corrected that setting and booted up without further ado. Will post if further problems arise.