This is somewhat Mac related, but I think it's more of a chip issue (esp on factory-assembled boards), so I figured I'd post here. Basically, I'm having repeated failures of an ATI 4850 graphics card ...
With reflow soldering, sometimes close is good enough. At the end of the day, the home gamer really just needs a hot plate or an old toaster oven and a calibrated Mark I eyeball to get decent results.
Solder connections on processors seem to be a very common failure point in modern electronics. Consider the Red Ring of Death (RRoD) on Xbox 360 or the Yellow Light of Death (YLoD) on PlayStation 3.