Few things...

One, ran memtest86+ today while I slept for 10 hours, 5 passes and was more than halfway through a 6th pass, 0 errors.

Two, I had to reseat my graphics card not even 2 weeks ago, so that's how I know it wasn't 'creep' or anything like that.

Three, I definitely think it was more or less a mistake by the computer and it just needed fresh power and to be safe, I have downclocked it from 985MHz on the core to 950MHz and thus lower voltages as well. I think either way though, I'm going to replace the power supply as I've wanted to for a while anyways, modular is just too hot.